All about lipos for RC models 

Really good! I've been keeping my batteries at full charge in storage :/ I really learnt something here

Anyone know where's the upcoming video he talks about? Where he was going to talk about matching your batteries with your motors, escs and props. I can't find it.

The "S" means the cells are connected in Series. ie. 2 cells in series + 2S = 7.4V :)

You sound like Sir Hammerlock from Borderlands 2 Nice video

Always love finding vids from your ch that I haven't seen yet. This was in my recommended list.

Wow, I think you just saved my (first lipo battery's) life! I'm very new to RC flying, and lipo batteries as well, so especially the part about storage charging your lipo's was an eye opener! Thank you for this very informative channel of yours! ;-)

It's not Milliamp or even Milliamps., as you keep saying. It's Milli Amp Hours, or mAh. Milli Amps is a measure of Current Flow, and Milliamp Hours, is a measure of capacity or discharge or current flow over one hour.

Informative but a little misleading. mAh is 'm'illi 'A'mp 'h'ours. Don't forget the 'h'. (1000mAh gives 1000mA for 1hour). OR (1Amp for 1hour). Or proportionally less current for a longer time. Otherwise a very interesting video. Your teaching style is great.

You have explained everything the best I've ever heard. Grateful to have found your channel. Appreciate the knowledge! Take care

how much runtime will i get from a 4400mah on 30c 6.6volt average use for servos . watching the video made me feel like i was back in school, in one ear and out the other .

Love this tuturial .. You are a great teacher. Good tips ! Thank you.

Kabala FPV said in one of his videos someone told him they only go up to 70c max no matter what number a manufacturer stamps on them that might be higher, is that true?

can you charge/discharge through the balance lead, just curious I noticed the battery/charger that came with my Runner 250 advanced. it seemed to be doing just that, except for the discharge I'm guessing.

thnaks for video have question why some lipo battery like 3.7v when we charge them they go over heat puff but other battery the same voltage and work fine

Best video I have seen yet explaining LiPo batteries. Thank you!

i don't understand how these batteries have JST connectors rated at 5 amps but somehow the battery delivers 25 amps. how??

Sir I have a question Can u mix lipro batterys, that are of the same voltage but different ratings assuming I dont drain below the lowest c rated battery My hook up is a serious connection, I have two 18.5v Batterys in serious, one is a 5000ma the other is a 6000ma Also could they be done in a parallel combo if that was all I had I do understand it's best to have two the same, but would it work ok?

I`m a bit confused. I never make the call on the C charge rate on my lipo packs. I plug them into my balance charger and it does the rest. A 3S pack usually takes 65 minutes to fully charge no matter the mah size. If i have a 1300 mah lipo, i will choose 1.3 amp charge, does this mean i charge the pack at 1 amp? What am i missing?

Since voltage x amps = watts (power), am I right to believe that a 3s 4000mah, 45c lipo would generate more power than a 3s 2200mah, 45c?

is there any way to test if a lipo charger is working properley without actually having a battery? my lipos caught fire while charging (was actually my fault, batteries were swollen and had a broken balance cable). i bought new batteries but dont know if the charger still works, and am afraid to connect the new batteries to the charger

I was given one of the little lipo cell testers and had no idea it could alert me when I was running low. It'll now be flying every time am out.

STILL the best Lipo video I've ever seen. Bruce, You Da MAN! Many Thanks from the UK.

I can't find your videos on determining Lipo battery size for models based on motor and ESC Would you provide a link??

Question? For Arrma Kraton Blx would it be better to run on 2 - 3s lipo or 1 6s lipo battery? Thanks

These videos are usually full of good info for newbs..NOT this one...the nomenclature is misused and NOT properly illustrated. If you're new, so more research and don't take this video as bible and don't write things down the way he talks...milliamps and mAh are not the same or interchangeable, one is a measure of flow and the other is a measure of capacity...totally different..

Tell me about using Lipo used on Land Vehicles? Brushless vs Brushed vehicles. Help.... Thanks,

Hi Xjet - you may remember me from our exchange of puns regarding the power-lines on the park video of yours :P Quick question regarding this charger business: I have a Fusion Ethos LX41B Pro. It only charges, however - no discharging. I'm thinking this discharge/storage voltage stuff has gotta be important so wud u recommend getting the Turnigy or similar despite me already having the Ethos? Thanks

Did an esc built in with a over discharge limiter in it? If it's not what would happened if the current goes below the recommend when the battery is in the sky??

By the way, the mAh means milliamp-hours, which is how much charge the battery holds. Great video!

I wish you had talked about the wires coming out of the various batteries. The large black and red wires are obvious but the other set of wires. What are those for?

I can see that I MUST move on from my lazy ways. My brain is still stuck in the good old Nicad off road buggy racing days. I even abused my Nimh packs almost as badly. So as I watched you video I was opening my old steel cashbox, (aquired for £1 at the recycling center), and dragging out my lipos for some TLC. None have had much use as yet. No, don't worry, I haven't been discharging Lipos on an old car fog lamp and waiting till it goes out! heehee! I'm not that foolish. ;¬)

Excellent video. I am looking at charging up to 4 Lipos at the same time, to cut down on charge time. Could you suggest the best charger for this please? (2200mah, 11.1 volt, 3s)

so if i have 2 11000mah batteries that are both rated for 5c charging what would i be charging the battery at if there in parallel

(1) NEVER GO BELOW 3.8V and your LIPO will never die. ;P Its as simple as that! Really! (2) And store them at 3.85V! 2 simple rules to REMEMBER!

I can't find your video on battery, esc, and propeller matching!

How do you discharge a battery if you have charged it but you can't discharge it with your plane?

Kind of quick with the whole "burn your house down" part eh? LOL

Well great job, where can I find one like your's? I have look at 4 or 5 but they are out of stock and do not have every thing on them like your's. so can you help a old man out? Have a great day!

Good video... The 1000 mah batteries is off on the hobby king comparison, They mislead you with labeling. they are notorious for this scenario: the hobby king is bigger/heavier because they use a 1200 mah pack call it a 1000 mah and this allows them to raise the C ratting... this allows them to use a lot of 3.7v 1200 cells in different applications keeping cost down... Also makes you think you getting a better battery...

Deepankar Maithani You should get at least 40C battery.

Hey Bruce. I don't suppose that my Accucell 6 is putting the energy back into my charging battery as it reduces the Lipo cells to storage level is it? Seems unlikely.

Hey! I'm trying to find the right battery for my 2007 Kyosho Twin Storm 800 and I have no clue what should I do.. I'm about to start pike fishing with the boat and I need a battery that lasts long and it doesn't even need to go fast. The boat needs 2x 7.2v lipos and I've been watching Traxxas 7.4v 30C 5200mAh 2S LiPo. Should I use this one with my Kyosho Twin Storm 800(2 motors)

and who spells ' cell' with a bloody s ,,, modern terminology is crap

It doesn't look like he responds to questions so I won't bother. Nice video. Thanks.

Sounds exactly like moog from MCM

Stupid question probably but can you storage charge a 1 cell 3.7 500mah battery often used in quadcopters? Since they have no balance plug and all, I wonder how it can do that. Oh, and at what rate should I charge say, a 650mah 1s lipo? Can you set most decent chargers to 0.65 amps? Or won't it matter if I set it to 0.5, take a bit more time but get it fully charged nonetheless?

Wow, total new guy here..that was awsome! Thank you, from a new subscriber.

You say to store at 3.8 volts. Could you please tell me what is considered to be low voltage.

I'm new to the hobby. I started off with toy grade drones and now enjoy fast carbon flying machines along with stable GPS video machines. I love the hobby and appreciate all of your extremely well made informative videos! I really thank you so much! Your a great teacher and one really smart dude. I love technology and electronics. I feel like a 40 year old boy sometimes. Don't ever loose that. Thanks again!

Very educational thank you! 1 question. I've seen some batteries that have what's called a "Star" connector. From what it looks like, it is the same as a Dean just has a more secure connection (no exposed heatshrink). Can anyone help confirm this?

Some good info but I'm a little confused about the 450mha being able to only able to draw a fraction of the C rating. My understanding 1000mha means you can draw 1 amp for 1 hour and 450mha for just under 1/2 an hour. C is the maximum discarge rate so a 1000mha will last a few minutes drawing 30 amps and 450mha will last less than half that. In short I believe the 450mha can draw its full C rating. please advise if I'm wrong as there is a significant difference and I would like to keep safe.

ummm..... what are the advantages of having hard cased as apposed to soft?

I keep making the mistake of watching educational RC videos of other channels, then finding a hugely superior presentation of similar subject matter here on RCModelReviews. Thus is the best explanation of lipo I have found. Awesome channel - great job!

I have a 4s,14.8v,3200 lipo for my t-28. my charger does not have a discharge mode. how can I get to storage voltage other than just running the motor on the ground? heat in the motor would be bad, would it not.

like u said 1000 mili amps is 1amp if you were to put a1amp load on the batery it will discharge in 1 hour put a 2amp load it will discharge in 1/2 hour! more amps the faster it discharges! 25c is maximum discharge before batwry begins to fail. if ur air plane set up pulls 30 amps at max throttle you will fry battery see! but if ur set up pulls max 15 amps the you can do the math like this 1amp load is 1 hour 15 amp load is 15 devided by 1 hour or 60 devided by 15 = 4 minutes of flight time at max throttle of 15 amps yes can recharge the battery at 1/4 of c rating safely that would be about 5 amp but still it is hard on the battery i go by a 1/8 rule if not in hurry if out in feild i do 1/4 rule happy flying

C rating is actually not the amount of current, it is just a multiplier for the 1amp current; that is the permeability that can be drawn multiplied to the actual amount of current. And about the size: a baterry with greater C rating is actually lighter. You are comparing two different brands of batterry that are made in different ways in terms of packaging..It would be fair comparing two batteries with the same brands and current but with different C rating.

Very good video, informative and erm.... energetic speech, that stops me from nodding at my computer screen when learning about these particular technological subjects. A skill that is very sparse. Thank you :)

Amps and milliamps are standard electrical units. However, what you were talking there was Amps over Volts or Amp / Hours

I chared my battery to go fly. 3S 1.3, 15c.and a couple of larger batteries. Didn't get out to fly and now have 4 batteries fully charged. To get them to storage charge using a 4 button charger do I need to discharge first then storage charge after, or just program to storage charge only?

great vids, always very helpful. what would you say is the most accurate, a battery balance/watt meter or balance charger. Why I ask is after a balance charge if I connect to my balance/watt meter to check it always says its out and gives alarm tone. I then balance with this meter but it all takes extra time. Both are overlander make the charger is RC-6s AC pro balance charger. Thanks

Those batteries you mention are only one cell, and as there is no other cell to balance it with, there is no need for a balancing connector. If you use an Imax type charger (or more or less any other for that fact) just connect it to the main charge port (red to positive, black to negative) and charge as a 1S battery. Measuring the voltage is just between the positive and the negative, the same as "per cell" method on the multicell batteries.

CONTINUED: No gender troubles....and besidees....I only connect ONE of them to bring the model on line....not both like a deans connector....where both negative & positive are made simultaneously. Besides they're difficult for me to get apart for some reason. I have a discussion question: After giving the battery a storage charge, would keeping the battery in the refrigerator be a wise practice?

@RCModelReviews I think we all agree about internal resistance hurting the efficiency more, when current drawn is higher. But the valid point that hot4plasma was trying to make, is that the largest numbers on these battery pack labels are in milliamp-hours (or amp-hours), (as opposed to just "milliamps" which you say at around 1:14 ). Because the quantity primarily indicates the *charge capacity*, not current rating. The "1C" spec is defined as capacity divided by 1 hour. To be pedantic.

Wot ho Bruce, Thanks for the Vid, I have two Batteries 2200mah lipos for the Blenheim which I am in the throws of building I have "all the gear and no Idea" electric is not my bag. The batteries have been charged buy Moi, not knowing of the long term affect.. On the charger which I purchased it has a discharge setting , Now my question is How does one use this or can this setting be used for the discharge of Lipos. Hugh

Hey, can someone help me ? I have a syma x8w quadcopter battery but my quadcopter is broken. I want to buy another quadcopter . I can mount the syma battery in another quadcopter ? the battery is een2000mAh Battery , lipo happy to help greetings Petet

Great helpful videos. One question; why is there a difference between the voltage stated on the cover of a battery, i.e., 3S Lipo is 11.1 volts(3 x 3.7 volts). But when you measure the actual voltage of a fully charged battery each cell is right at 4.2 volts. Why isn't the 4.2 actual voltage used in all the calculations?

Great tutorial Bruce....in fact you are a natural teacher. State your objective....do your presentation.....then tell us what you told us. Couldn't be better than that. As for connectors....I saw early on that these things were going to be a problem for me....so I use the Anderson Powerpole connectors.

I sometimes charge a bunch of batteries the night before... then the next day, the weather turns to crap and crap for several days after that. I'm wondering how long I should keep them at a full charge before they get damaged. I heard at AllThingsThatFly you shouldn't keep them charged for more than a week. What say you Bruce?

Wow! Excellent video. You taught me a lot that I didn't know being I'm new to quadcopters. I have 3 & didn't know this important info about lipos. Thanks again!

It would be nice "if" the Batteries had a date of assembly ! How many times ....did you get a battery that was just so old...it oozed out liquid or started swelling in just a few charges ?

I am shocked that these batteries don't have more capacity. This is why I don't like to use these kinds of cells for power banks. I go for capacity rather than current delivery, as in most cases my power banks will only have to put out 3 amps max.

Useful video, but pet peeve is failing to distinguish capacity from current, capacity is in milliampere-hours, or ampere-hours, which is current x time. So the letter C really means "capacity divided by 1 hour", which is a true current. End of pedantry!

Thanks 78E. I recently bought a iCharger 4010 Duo and I see what you mean. Only, does the 1S cells need to be storaged on 3.7 somewhat Volts? like the 2, 3 and so one cells? Or is that only necesary with batteries with more than one cells?

Gibe it up man. You made you first mistake with you first statement about what something means. Geez. It's mAH, milliamp HOURS!

Nice video, just one complaint: The capacity of the battery is rated in ampere hours, not in ampere as you say in the beginning. Ampere is a unit for a momentary current, ampere hours is current over time, which is capacity.

mili=1:1000 because if you have 1000 mili liter that means you got one liter same for batary

So where did you buy this Battery Balancer & Watt Meter?

No mention of cold storage? I did not see any recommendation about suitable chargers although charge rate is well covered. How do you know what connectors advertised batteries have?

This may have been asked already but here it is anyway. Someone told me that storing ur lipos in the refrigerator. That this would virtually stop any discharge. What do you think?

Thank god i found this video. I wanted to scratch build some models but i realized i just didnt know enough about rc plane electronics and batteries were one of the topics i was fuzzy on.

Are you Aussie Vaz from Aussie RC Playground?

can i get a link to both those items the battery alert thingy and the other battery meter thing.

thanks Bruce learnt heaps off this video about Lipos... like how not to burn the house down ! had no idea about fully charged Lipos sitting around ! Thanks again

I don't need an alarm to tell me the battery is going down, I need one to tell me the ground (or a tree) is coming up. An earth-reject feature would be good.

I came to look at the video to find out about 2s1p or 2s2p and you didn't explain it. I was done right there. I Like a lot of your videos but disappointed over that part not being explained.

How long can I safely leave a lipo battery fully charged? A few hours or days or weeks? Is it bad if I charge my batteries the day before I go flying? Or even a couple of days?

Tnx a bunch! I just got a delivery of eight 5000mah Hyperions. I didn't know about the storage charge, so I guess u just saved me a buck load of cash!!

if you charge a lipo at a high amount of amps will it affect the flight time?

You make some really good videos. However, I have to agree a complete noob would be totally confused about your explanation of amps and not about amp hours.

after flight can we charge batteries when their voltage drops to 3.8 like that or else i need to drain fully upto 3.5 by flying for more time like that for better life of batteries.

How do LiFe batteries compare to LiPo? Can I use something like the Turnigy nano-tech 1700mAh 2S1P 20~40C LiFePo4 Receiver Pack in lieu of a LiPo?

video on lithiums and diy packs please. do cheap diy packs.

Quick lesson. It's a proven fact that any type of cell (body cells, ext) the cold will slow the cells depth, the warm the quicker.

Cool video, gives me some insight to hobby batteries. It would be nice to see one on charging and discharging also battery charger selection. If possible.

Brilliant explanations!!!! You got a new sub!!! :D

Are you supposed to balance discharge and charge or just balance charge? Thanks

Can i charge one of this batteries while it is powering another thing?

I wonder why Gens-Ace incorporated raging flames on their lipo labels?!... Seems that might make consumers a bit nervous?.. ;-)

I really enjoy your videos. Very educational and good sense of humor. I feel like attending an electronics classroom with an excellent teacher. Thanks a lot.

Oh and it's milliamp- HOURS not mili amps, miliamps is current and miliamp- hours is the capacity, great video anyways