How to save a 7s battery with one dead cell?

thingiverse

Lipo batteries also power rc cars or drones, and they're extremely popular in some rc car or fpv races. High voltage batteries can give your rc cars or drones high speed, but what to do with a 7s pack that has one dead cell? First, you need to know some basic lipo battery knowledge. A LiPo cell has a nominal voltage of 3.7V, and one lipo cell equals one cell which equals one S which equals 3.7V. For the 25.9V battery above, that means there are four cells in series (which means the voltage gets added together). This is why you'll sometimes hear people talk about a "7S" battery pack – it means there are seven cells in series. So a four-cell (7s) pack is 25.9V, a three-cell (3s) pack is 11.1V, and so on. This is a gens ace 4400mAh 7s 60C lipo battery that I bought from gens tattu – it's a famous high voltage lipo battery for rc cars and drones. What to do with a 7s lipo battery that has one dead cell? I had a 7s lipo that got one dead cell. After 10 hours of constant charging and discharging, I gave up - she was dead. So what to do? You could remove the dead cell and make two lipos – one 4s and a 2s pack. Notice: Don't do this if you don't know what you're doing. It's very dangerous. Step 1: Remove the balance plugs with a pin, and put the right ones on a new 2s balance plug...and go ahead and do the same for the new 4s lipo too! Step 2: And wire everything correctly for a 4s and 2s packs... The warped in plastic is the dead one...was showing 0.2v now... lol Tagged and warped the others to know what they are. Step 3: Now I have a 2s pack for my new build Exo terra from axial, and a 4s for the Xray 808e sct, or whatever comes up...And don't need to throw this lipo into the right dumpster. At last, you must notice again: make sure it's very dangerous and people need to know what lipos are and what they're doing. If not...don't do it! I did it because I have "experience" and know what I'm doing in rc stuff.