Originally Posted by Weatherman (Post 1506057)

Be cautious with the cheap Tenergy batteries that you bought. Don't expect them to work when you need them to. The Tenergy brand self discharges as much as 50% of its charge when sitting unused for a week. They may work OK just after a full charge, but a week or two later they are useless until charged again. :banghead:

All-Battery is a company that I do not recommend doing business with. I bought many of their AA batteries and a few of their chargers a couple of years ago. I didn't need to use them right away, so I just put them aside in their unopened plastic cases. Several months later, I read complaints about malfunctions with some of the Tenergy batteries, so I opened all the cases and tried to charge the batteries. Many of them were very difficult to charge, but they finally did work. However, four of the AA cells were shorted internally, and they would not take any charge. I contacted All-Battery "customer service" (a true oxymoron! :confused_ma:) and offered to buy more stuff from them if they would include free replacements for the four bad cells they sent to me. Their reply essentially said that the original purchase was a little past warranty, and they did not want to hear about problems with those four bad cells. :bawling:

Instead of buying cheap Tenergy cells from All-Battery again, I bought some good quality Eneloop cells (that do hold their charge until you need to use them) from another company. I also bought a "smart" charger that can softly charge the cells at 200ma overnight, and it works great. :tongue_ma: The chargers I previously bought from All-Battery would force 500ma or more into the AA cells, and make them too hot to touch near the end of the charging cycle. :rant: I do not recommend anything that All-Battery sells. :452:

Originally Posted by markt (Post 1529285)

A few months ago or so NiMH technology improved and ultra low discharge rechargeables came on the market. My wireless mouse batteries always died after a few weeks even though the mouse's power drain is nill. And the digital camera batteries had to be charged the night before picture-taking events. That's because most NiMH batteries lose all of their charge after a few weeks even if not used. The new ultra low discharge batteries keep their charge for months, a major improvement. Now my wireless mouse lasts a much longer time between charges. Most places still don't sell them. This place does: