Cen-Tech 4-in-1 Portable Power Pack - Product Review 

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Thank you sir....very direct...to the point not trying to be a comedian or nothing just instructional.....THANKS ALOT!.

Great video! Clear and concise. Thorough! Thank you!

Great video. Thanks for showing all of the features. Handy tool to have around,

Thank you for a great review! I could not figure out how to turn the USB charging port on until I saw your video. Very helpful! Brian

I just had this item from harbor freight and I am charging it right now, your explanation very well said.

Thank you for this very helpful video for a non mechanic type of person like me! You made the operation of this power pack so easy to understand! I just bought one. :-)

Thanks soooo much for making this video, I'm going to try mine now!!!!!

This really help me out a lot you cover it all thank you

THANK YOU! I was just "gifted" a used one, and was wondering how to properly use it.

Thanks for the video. I like it.

Appreciate the review. Good thing to carry in your caaa.👍

I just bought one brand new from local Harbor Freight. Charged it up and then used it to inflate a pickup tire. Within minutes, I heard a pop from the portable pack and then smoke began billowing out of the portable pack container. Fortunately, it was only two days old so I am returning.

Ok so I have read the comments and I would like to say that I had the 3 in 1 and lent it to my son. He failed to recharge it when it went red and it was trash . You must follow the maintenance to the letter for the battery to work as promised. I also suggest the 1st charge be the entire 48 hours even if the light comes on it seems to make a difference in the longevity of the charge but not sure why. I plan on only using it to run a few items while camping and pumping up floats so I think the 80 dollars is worth it the other ones are super expensive

I have a question about the 4 in 1. I got one of these in a sale that I bought a bundle of things. I found a manual which was a great help but I'm not sure if what's happening is normal or some type of warning. When I turn the off knob to on the light flashes under the green gage but there is also a very high pitched whine that starts also. When I turn the knob off it stops. The manual states when it's plugged in to charge that all three lights will flash until it's finished and then the green light will stay on. When I plug it in no lights come on and maybe 3 to 5 minutes later the green light flashes and the high pitched sound starts also. I unplug it and the light goes out and the sound stops. Is this maybe some type of warning or is it along with the light is telling me it's charged. Everything seems to be working but we tried to boost someone and it didn't work. But, the manual says to hook the negative to metal on the car for 5 to 9 minutes or it won't work. We didn't know this at the time therefore I assume that's why it didn't work. Idk. Could you help or have you heard of this high pitched sound. It's a solid sound until u turn it off or unplug it if charging. I just don't want to try and use it if it's some type of hazard warning. I hope it's just an "it's charged" warning. Any ideas?

Glad I found you, just got this same unit I'm 65 and I watch videos for everything. My question is can I test a car battery with this unit to see if it's dead or alive and if it's dead can I charge a car battery with this unit and how do I do that. Cherylle from California

Thank you

Three questions please: 1 -I have a Dodge Ram 2500, can I use this to jump start that heavy a vehicle. 2 - I have a golf cart with 6 batteries, will it work on that? 3 - If I lose power to my house, do you know how long it will keep an appliance or a fan or whatever it is you want to run, going? Hours? Minutes? A day??? Thanks. Video is great, I like how you really show/demo how to use all facets vs just saying it has this or that.

any idea if you can trickle charge a battery (out of the car) with it? doesn't seem like its set up for that.. but idk

Thanks.I could use one of those.

Hi thanks for u video,I need to change for 48 hrs like they said in the manual?

I have a syntax 4-in-1 my body hooked it up the wrong way now I will not charge don't wait should I get away with just changing the battery I think it would work

I missed where you set the air pressure to inflate the tire, say it takes 36psi to bring up to pressure, how do you set the gauge to 36psi?

Why does the green batter light Stay on all the time? Shouldn't it shut off when it's unplugged & not charging??

Wait you connect it for 5mins then turn it on or you connect it , turn it on and wait 5 minutes before you start the car .. mines had only worked once so I'm bout trash it.. very frustrating in an emergency. Please clarify .. thanks

Nice video I have a question can you also charge your battery in the house with thecentech 4 in 1

Hey I was wondering why the lights would be flickering while I was charging ?

when i plugged mine, no lights came. does not seem to be charging. is there a fuse somewhere? can you operate the inflator alone?

Mins says fully charged (Lit up green) no red or yellow at all after only ten minutes?? Not sure what to do

Where and how do you charge it I have one and it just keeps making a loud noise but the battery level is low

why did the oil leak out of my Gen tech? Can it be repaired?

I drive an Audi s5 2010, does this wake up the battery?

Can you charge this charger by using the cigarette lighter port? Thanks

good

Is it safe to leave it in the trunk in hot weather?

Can this be used overnight charging a dead battery

Homeowner Repair I have the same Centech power pack. The issue that I am having is once I connect the jumper cables, the red battery light goes on and you hear a obnoxious beeping sound. I have attempted this on two different cars and same result. You would think it just needs to be charged, after fully charging (green light on), the beeping persists once I reconnect the terminal cables in there correct orientation. I am not receiving any power. I have no idea what the issue is.

Bought a Cen-tech 4 in 1 ( JUNK BOX ) from Harbor Freight and it wouldn't hold charge after a couple of months and air compressor went bad. Try to return to Harbor Freight for refund or exchange but they didn't stay behind their product.

How long did you charge yours for the first time you charged it ?

How do you do it

These don't last very long they stop charging after a couple of times after use, I have tried 4 of these exact ones they are defective! Get a JNC 770r I have had mine for over a year now and it still works as good as new. I got 3 of these at first for gifts for my son, daughter, and wife cars they all failed within a few months the charging circuit is the problem you can charge them with a 2 amp battery charger but just to much for me I would recommend a different one for sure. They also failed after replacement the first time so we moved on to JNC 660's and JNC 770r's.

Instead of grounding it, can you just hook it up to the negative terminal ?

My charger stop working

You forgot to mention what a piece of junk this was. NEVER should you allow this device to deplete, once it goes into the red it will no longer charge again! The last one I bought (can't remember who made it) stayed charged (on and off again) for years.. It stayed on my workbench and when ever I needed it, it was ready to go. Figured I could do the same with this one but after just a few months the HFPOC was dead and could not be recharged. My advice? Spend a few $$ more and get one from Sears.

Mine flashing yellow

I wish I would’ve found this video before I purchased. I wanted a jumper pack not this this seems more like junk battery charger. I don’t think it’s what I want. I’m gonna try it tomorrow to start something that does not have a battery in it but it probably for my use this is not the right thing. PS I wanted it to start vehicle that do not have a battery.

Its too heavy and it does not show the battery level that is beeing charged.returned!

One more thing the compressor says 250 psi there is no way it took over a half an hour to get to 40 psi. I am so sick of these companies building stuff. That’s hard on the environment.

Save your money - Its old lead acid technology that take over 30+ hrs to charge and doesn't last long in your trunk. Its useless in an emergency and takes too long to charge - ONLY GET LITHIUM ION - Like incandescent compared to LED.

Same bought it use it don't work

These are junk bought new one harbor freight air compressor doesn’t work

Chinese junk does not hold a charge can barely jump a compact car if youre lucky. Seems like it takes hours to fill tire with compressor. Spend a few extra bux n get a better product