I'm a battery geek. I've been using rechargable batteries for many many years and these Sun-Pak batteries are easily the WORST batteries I have ever used. They do NOT hold a charge very well and they do not reach full capacity even when using my very high quality computer controlled charger. These batteries were never good and only got worse.I suggest using the Duracell 2650 mAH batteries or any batteries by Maha/Powerex.