I have a Watson B-1544-2 rechargeable battery pack. It replaces Canon LP-E6N battery for my Canon EOS 7D Mark II DSLR. After placing the battery in the charger and then in the electrical connection, the charging light fails to come on. I cleaned the terminals on the battery and battery charger, tried again and no dice. I have two Canon OEM battery chargers and so tried to charge the battery on the other charger and again, no dice, even after another thorough cleaning. The battery reveals 85% power remaining when checking it out in-camera. The camera does fire up and takes photos very well. I have charged this battery many times without any issues and it never failed to perform as intended. I tried several Canon OEM batteries and no issues at all, as the charging light came on using both Canon OEM chargers. Okay, this may sound interesting. I went ahead on a lark and placed the battery in the charger and inserted it into the electrical connection and no charging came on. I thought, well, why not try pressing down on the charger to see what happens, and the charging light came on. Unfortunately after about 30 seconds the fully charged light appeared. I replaced the battery in the camera and the power level indicator still revealed 85% remaining power. This clearly indicates to me that the battery is fading out and will need replacing soon. Thanks for reading. Tony ) P.S. I placed the Watson battery back onto the charger and waited 30 seconds and the fully charged light came on. I then placed the battery back into the camera and it indicated that the power level is now at 99% with three green bars for charging performance with zero actuations. ??? I then turned the camera off and left the battery in the unit. I waited a couple of minutes, turned the camera back on now the power level indicator revealed only 80%. This is clearly an indication that the battery is on its way out. It has been a very good battery as even after 5 years of continuous use it is still at 80% maximum power. Will have to make it a point to keep a close eye on it before taking it out for a shoot. Thanks again. )
