Tenergy 5-in-1 Battery Meter, Intelligent Cell Meter Digital Battery Checker/Balancer for LiPo / LiFePO4 / Li-ion/NiCd/NiMH Battery Packs

Simple, Easy, Functional. Absolutely must have for LiPos owner

I have at least two other meters for measuring battery voltage and one that measure power also. But they don't read the internal resistance (IR) of my LiPo batteries. This one does and I think that is quite important for understanding your LiPo battery status and knowing when they should be retired. This meter provides that measurement for each cell. There are no instructions with the meter however, and I had to resort to YouTube to find how to use this - I might suggest you check out one of those before buying. There are other functions provided by this meter and I will need to do some exploration to see how to use those other capabilities. A simple link to some instructions would be very helpful.If you don't know how IR affects use, simply add up the IR for each cell (they are shown in mill-ohms) and multiply by the current you expect in operation. This will tell you how much voltage you drop at the battery. Take the square of the current times the IR total and that's what your battery looses as heat due to the IR. If the total IR for a LiPo averages more than 10 milli-ohms per cell, it's likely time for retirement. Note - you will see that the first and last cell are where most of the degradation happens.This is a good product, but some use information would be VERY useful.

I have had similar testers which look almost identical to this one but come way short of capabilities this one has.As a designer myself, I would like to compliment that person for producing such a helpful tool!Everything functions as described, (Have not tested the servo drive part yet though) and the added features are very appreciated and useful! Internal cell resistance and battery balancing and the voltage difference between the cells works up to a very well designed product! I highly recommend this tester!

Caution, there are products that look exactly like this unit, without all its features. That's why this one costs a bit more. This does internal battery resistance which is very helpful. It reads voltage of each cell and percent of battery remaining as well. It has a battery balancing feature but the manual states that you should only do this for 5 minutes at a time and allow the unit to cool. Overall, I really like this and only gave it 4 stars because the instruction manual could be better.

Good and inexpensive balancer/cell meter with a nice screen. This is sold for more under different brand names from other places. (the same unit) Not super intuitive but the instructions are pretty simple. It balances and reports on Lipos. In the lower right hand corner it shows the percentage of charge you have which is nice. It can take a long time but I think that is just the nature of balancing. I tested it on a 2s Lipo and 3s. Balancing is pretty easy, Just make sure you have the right type of battery selected (for example, make sure it detects LiPo 3s) then hold down Cell for a second, it will say "Bal", then press Cell again and it will begin balancing. Once it is really close, it will make a short beep. I find it best to start balancing as soon as you are done using it and then during charging. (balancing after it is charged isn't as good from what I have read)I cannot figure out how to use the discharge feature to get it to 3.8v per cell for storage. I would like to use this feature though.The NiMh functionality is just to show voltage. (Like a voltmeter would) You would need some kind of special adapters for this. (a cable that goes from whatever your battery connection is down to the little white plug that this takes) I don't see the point. I have a $10 volt meter for that. I can't think of a good reason to want to monitor a NiMh batter anyway, other than voltage. It doesn't come with the cable that you would need to check NiMh batteries but I doubt it is worth pursuing it. For LiPo batteries however, this is a very useful device.

Use it every time I fly my rc planes. So far it has not failed me.Good items to have on hand.

Great cell checker! I can read it really well because the numbers are big! It balances my cells really quicky and effiencently!

This is the best option for tesla modules.