I know its no help but struggle to tell you of a good experience with any battery. They never last long and some take a recharge properly if you run them totally empty in use. I bought a new one recently with my pigeon whirly gig and a used one off a chap selling pigeon equipment in a local game fair. Neither lasted more than 2 charges; I am really annoyed - the game fair guy must have known he was selling duff gear.