Charging A123 M1 Cells?

[starscream]

The A123 Sonic charger can only charge up to 3S so you will have to use another method if you want to make a 6S pack. I currently use a 4S pack and 2S pack in series.
The M1 cells should be charged with the cccv method. A Lipo charger will work but you will have to manually monitor the voltage and pull the packs off before they reach 3.6 volts per cell. The LipoDapter allows you to charge up to 8AMPS and cuts the charge off at 95% capacity for the M1's and 85-90% for Lipo's. I got my M1 packs and LipoDapter from Pete at www.modelelectronicscorp.com

[jhautz]

so really it just needs a lipo charger that has a 3.7v cut off on the charge vs the 4.2 a lipo would use.

Are there any lipo chargers that have an adjustable cut off voltage? That lipodapter seems really confusing.

[starscream]

Originally Posted by jhautz

so really it just needs a lipo charger that has a 3.7v cut off on the charge vs the 4.2 a lipo would use.

Are there any lipo chargers that have an adjustable cut off voltage? That lipodapter seems really confusing.

The cutoff voltage for M1's isn't 3.7 its 3.6 volts per cell. The LipoDapter is really easy to use and has automatically cutoff at 95% capacity every time I've used it. The Xtrema is an example of a charger that has the capability to charge Lipo's and M1 cells. It runs around $190. I already have a NiMh charger that I can charge up to 7.5 AMPS so I went with the LipoDapter. There really isn't anything fancy about the LipoDapter, its straight forward and easy to use.