Low Power Battery Capacity Tester & Voltmeter

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For my upcoming major project, I'm looking for a very low power consumption voltmeter that I could leave on for 24/7 display and not put an appreciable drain on the battery. I think this unit is the best I can find. With the backlight on, it pulls 2.88mA, and with the backlight off, it only uses 1.30mA. It also has a sleep function that when enabled, it only consumes 0.01mA while sleeping. It's good for lead acid, lithium ion and lithium iron phosphate packs.
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28 авг 2024

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Комментарии : 78

@jeffladd1146 Год назад

Just wanted to say thanks for making this video. I installed one of these in my 48v golf cart and it constantly read 100%. I followed your instructions, switched it from P01 to P04 and now I’m in business. You rock! 🤙🏼

@TargetingPod Год назад

Having the same issue with my 36v

@DaytonaShooter Год назад

Thank you for the tutorial. It was a little confusing wether to power down, or disconnect completely. You save me some trial and error with this video. Much appreciated. 👍🍻 P.S. the trick with activating the battery select function and then moving to the S functions was invaluable. My directions had no reference at all to that procedure and when I tried to set it without 'waking it up first' , nothing was happening and I had to rewatch your instructions. Great job! Thanks again. 👏

@badass19671 6 лет назад

I purchased this same meter thinking it was a battery gauge!! I hooked it up to my kayak and when the 12v battery drained, the meter said 98% full!! I guess I bought the wrong thing!! Great video btw!

@tavershima 4 года назад

I had a similar problem but I discovered I choose the wrong battery setting

@tayloroaks565 3 года назад

Very informative. You helped me navigate to the correct settings for my project. Thank you.

@machinistsunion6384 11 месяцев назад

Would love to have a digital copy of the instructions....can't find them anywhere....google, amazon, etc

@alexwingo8094 4 года назад

I have one of these too. I really like it because I could turn it off but I never knew how to access the setting. Thank you for the video and thank you for checking the amps. It really helped.

@billfisherman6577 Год назад

Best explanation I could find.

@davidmeagher4909 5 месяцев назад

Thank you for posting this video… It really helped me to get my one of these all set up… thanks again🙏🏻

@ChristianMontmarquette 3 года назад

I plugged this voltmeter directly into the bike's battery charger input and it works. But I believe this voltmeter can also be directly connected to the negative and positive poles of the battery. For the rest, you must select for example, type L for Li-on battery, or F for LiFe-Po battery; then, the number of series of cells as shown in the video, knowing that the number of series and parallel is generally indicated on Li-on batteries and LiFe-Po battery; like for example : 7S - 15P = 7 series and 15 parallels.

@Lethallead138 Год назад

Very helpful video. Thank you for explaining this in detail.

@rickappling5470 Год назад

The reads may be slow because there is a Kalman Filter. Which would take a few readings to stabilize.

@julien7111 3 месяца назад

Very informative good content man

@arionreece4311 7 месяцев назад

Thanks man couldn't get in to sets

@solarsynapse 5 лет назад

Great info! I have a blue display unit with the connector straight out the back and no instructions. You turned junk into gold. Mine has values 1-17 so I am guessing with the low voltage cutoff that 2 would be as low as you can go for the L and F settings. I was thinking that for the P setting each number was a (2 Volt) cell like the L and F settings but now it makes sense that each number is an increment of 12 Volts. The specs show 6V-63V so the upper numbers would not work either. It was probably easier to make everything 1-17 instead of using the actual range of each battery type. Thanks for sharing!

@darrenbarkerful Месяц назад

Any idea what thickness/gauge that wire is? The leads are very short and looking to extend them. Thanks!~

@rubenzamora8764 2 года назад

How can I find out how many cells my amped outdoors 12v 12ah Lithium phosphate has? I went to their website and can't find it. I have the exact capacity indicator. Thank you for the great review.

@Jlui83 6 лет назад

You hook this up directly to the battery with its own wires?

@Barryd57 Год назад

Yes.

@zuchamotungoe6817 6 месяцев назад

Connect it a switch any side positive or nagative terminal

@aussiesandtrails 7 лет назад

Just ordered. new to solar diy. How should I connect this directly to my 12v battery?

@amathonn Год назад

I see only battery level, voltage and temp. How does one get back tot he original settings?

@planbskater1791 3 года назад

Helped so much, thanks mate

@SuperPankaj84 5 лет назад

Thankyou for detail knowledge about device. Can u please provide link of following discription because I found no where on internet.

@anthonyglynn7361 2 года назад

BIG HELP THANK YOU 🙏

@josephteeple8155 3 года назад

Great video! Thank you

@m.g.1316 3 года назад

Great Video!

@pravin1vaidya 4 года назад

hi thanks for the review. My device is still showing the voltage rather showing capacity. i have followed the same procedure but not finding the correct things in this device. pls help ....

@jeffjerina1718 3 месяца назад

I have the ogrphy lifep04 battery. 36v. I'm golf cart. I can only get it to show 100% 40.v. I have tried L1-12 and F1-12 all settings stay at 40v. How do I get it to show 36v? What should it be set on? I have tried 100 different combos

@Dmichel123 Месяц назад

Discharge the battery to nearly empty (36V) and it will show 36V.

@wilsonganks 2 года назад

Thanks....very very good video

@lowellschlef9307 6 лет назад

This is a great video to help with my application. As I understand, both wires out of meter can be directly connected to two 12 volt batteries that are in series. For me to make the connection, I need the wires to be feed into an XLR connector that can plug into the charging port for the batteries. Is there any simple way to make that connection? Direct connection or some adapter to get me to the meters wires? Can you make any recommendations?

@romangloman6953 5 лет назад

I need a meter with this architecture but to monitor alkaline batteries. Do you know of any available for this application?

@kuro68000 7 лет назад

I'm surprised it uses 1.3mA without the backlight. I was expecting about 1/100th of that. Maybe there is an open source project here.

@madelectronengineering 7 лет назад

The display takes next to nothing to keep powered, most likely 1mA of the total 1.3mA is just keeping the two chips powered and working. That's still very low overall.

@Flicka20 6 лет назад

Need to clarify one thing but Thanks! since no instructions came with the meter I was tickled to find your video! When setting the meter to lithium the number you set next is how many cells are in the battery. I found it is usually 4 x 3.7v to make up the 12v. So if you have 2-12v lithium batteries in parallel you set it to 8 cells not 2. I think you mentioned cells but I was thinking batteries and set it for 2 but got false reading. Thanks again.

@solarsynapse 5 лет назад

2 12V lithium (phosphate nominal 3.20V) in parallel would be F4 and 2 12V lithium (phosphate nominal 3.20V) in series would be F8.

@jaimedessus1605 4 года назад

What would 1 lithium 12v 50ah setting b

@yusuf_f_f_f 3 года назад

i connect it to 4s 18650 with bms but screen shows e07 what does it even mean ?

@lystervillanueva6077 5 лет назад

can you send the the description file? thanks

@wasimahmad561 2 года назад

Bro i have one of these and its not turning on can u help me a little bit to how to fix it...🙏

@TargetingPod Год назад

If I have 6 6V led acid batteries would I do P 03?

@key39075 3 года назад

I have "one button" version of this voltmeter, so to set it up, I need to get into battery pack to press the button on the PCB. Nevertheless, I set it up for my 14S Li-Ion e-bike battery pack and it shows around %30 for about 50V (not exact numbers but percentage seems too low). I'm sure I set the "L" letter, not P or any other. But the lithium ion discharge graphs I found shows this voltage is about 50% charge. I suppose one of the settings change the current "algorithm" for calculating percentage, but as I cannot fiddle with easily, I cannot test it. If anyone knows about this, any information is appreciated.

@ranger178 11 месяцев назад

these cheap meters are not accurate enough for lithium I tried 2 and got different readings from each.

@kineto7 6 лет назад

Nice video, I was really looking forward for instruction manual, as mine didnt have any. Well.. I calculated.. and if it draws these 1.3mA.. then that means it will still take about 1ah over being powered for 32 days.. So, if battery is smaller, it might draw significant amount if left for more than 3 months.. Though user should probably never leave the meter on for such long time and not check up on battery in between.

@ranger178 11 месяцев назад

these cheap meters are not really accurate enough for lithium ion the whole range is about .3 volts from full to empty they need at least hundredths of a volt. I tried two of these meters and they read 2 tenths difference between them and way off from an accurate digital multimeter.

@kellymelrose8527 3 года назад

Mine reads 100% all the time..is it wired in wrongly

@key39075 3 года назад

Probably wrong settings, you need to set correct number of batteries connected in series. Mine is 14 li-ion in series so I set it as L14.

@moejrbig 5 лет назад

Can I use this on my boats 12 volt 800 amp house battery system?

@technicalnj2337 5 лет назад

How is the set at 12v ×4=48 Battery

@brunningwolf Год назад

Do you have any idea what your doing

@digiacestore 3 года назад

what mean curve S-5 ?

@francoprairie2888 4 года назад

Great video. Now could someone pleaaaase, show how or where in the battery you connect the negative and the positive wires in an Electric Bicycle. I live in the Toronto area, and I had called so many places that deal with batteries, mopeds, Ebikes, etc, but NOBODY wants to install this simple device. Most are just sellers or just don't care for Ebike services. My battery is a 48V 13AH Li-ion Hairon Ebike battery- 65 battery cells. Thank you.

@ChristianMontmarquette 3 года назад

@appurvachauhan3445 6 лет назад

Hey man I really like your video and thank you for understanding me how to use this but still I have questions and I what a proper answer I have 4s lithium ion battery and all call are around 3.58 v so can you tell me how to check the capacity of that 4s battery (what setting I have to set ) I have you will reply and thanks again

@solarsynapse 5 лет назад

Use L4. Lithium Polymer peaks at 4.20V per cell and Lithium Ion at 4.10V per cell. Nominal is 3.60 and 3.70 respectively. I personally would not let either one go below 3.00V per cell although manufacturers take them down to 2.50V per cell to get more run time and to shorten the life so you will buy more.

@berniebass3575 2 года назад

I was noticing that black was power??.

@terbor72 5 лет назад

Is it possible to use it on two 6v 4.5mh batteries in parallel?

@solarsynapse 5 лет назад

Parallel won't matter. It will still read the voltage.

@AbieKuntadi 3 года назад

I have set mine to P-12 as I have 12v lead acid battery for my motorcycle. The voltage is alrightr around 12 while the engine off, and 14 when the engine comes on. But the battery remain 0%. Any clue?

@-RF- 2 года назад

Set at p-1

@bud6681 2 года назад

@@-RF- but how do you get an accurate percentage when running 6 8v batteries on a 48V golf cart? Closest I have is P04 for 48 volts but it’s showing 87% and 51V (which is accurate)

@theo2378 3 года назад

@ 5:40 settings part of it

@profkwl775 3 года назад

F is not lithium iron phosphate, according to your link, but Fe Battery. L is for lithium battery.

@user-vl8kr3hv7c 3 года назад

Fe Battery. = lithium iron phosphate (3.2V) images-na.ssl-images-amazon.com/images/I/61Qwxqg2eBL._AC_SL1000_.jpg

@egor909 Год назад

what's the setting for 6 8 volt batterys 48v golfcart, I have mine on P 6 but it always reads 100%

@JayBillingsley 8 месяцев назад

4, The guage assumes 12V batteries, so 4X12 is 48. My problem is that mine shows 87%, and I can’t quite figure out how to reset it at 100% when it just comes off the charger.