Slightly Unbalanced - 12.8V 36.8ah LIFEPO4 A123 MODULE W/ BMS

These batteries charge and discharge fine but when they reach around 11.5v the BMS shuts off because the cells are slightly out of balance. These test around 80% capacity as is so they can be used just fine if you keep the discharge limit to 12v. At this price you are getting 64 A123 lifepo4 cells that still have decent life left and the BMS is in perfect working condition. We recommend to use these packs until they stop working, then you can easily rebuild them or break down to cell level and reuse the BMS and wiring for another build. The value is here at this price and you will likely get a decent amount of years of use out of these as is.

YOU GET 64 A123 ANR26650M1A CELLS IN 4S16P CONFIGURATION. THIS IS A REALLY NICE BATTERY. THE A123 CELLS ARE THE OLDER M1A MODEL. THE BATTERY NEW IS 484WH.

THE BMS DOES TOP BALANCE AND IT IS MEDICAL GRADE WHICH MEANS THIS IS TOP OF THE LINE. THE WIRES COMING OUT ARE 10 GAUGE WIRES AND IT HAS AN ANDERSON SB50A CONNECTOR SO I WOULD LIMIT THE AMP DRAW TO 50 AMPS JUST BECAUSE THAT IS WHAT THE 10 GAUGE WIRE AND CONNECTOR IS RATED FOR. THE BMS SAYS MODEL VC4145SB. I THINK IT STANDS FOR 4 IN SERIES AND 45 AMPS FOR THE DISCHARGE RATING OF THE BMS WHICH WOULD ALSO MAKE SENSE BASED ON THE WIRE AND CONNECTORS USED. GOOD RULE OF THUMB IS TO USE ONE OF THESE FOR EVERY 500 WATTS OF POWER REQUIRED. 

THE THICK, CLEAR, PLASTIC ENCLOSURE MAY BE DIRTY, HAVE SCRATCHES, OR BE MISSING. YOU WILL WANT TO TAKE THAT OFF ANYWAY TO GAIN ACCESS TO THE CELLS AND BMS ANYWAY.

DIMENSIONS ARE 9.5" X 5" X 5.5". THE POWER CONNECTOR STICKS OUT AROUND 10" FROM THE PACK.