I have use rechargeables for years.. Starting in about 1974 with Sanyo batterys that lasted for years. [these were ni-cad batteries] I used them in camera flash units and they provided very good service. (this was actually commercial service.... ie: lots of use) I have been using a bunch of cheap 'knock' off and some Energizer batteries and some MaHa batteries... Well the knock offs don't last, and the Energizers are beginning to die.... But my original Maha PowerX cells.... well they keep ticking... The charger that you use has a lot to do with the battery performance. I have been using the Maha 401 charger and now I am using the Maha 808. If you want my opinion....... buy quality nmhi batteries and a quality charger. Walmart does NOT sell quality! Of course: i have no interst in Maha or anyother commercial endevour... Just my opinion Bill, VA3OL Kingston, ON