canthai55 Posted May 29, 2021 Share Posted May 29, 2021 NiMH batteries never seem to last even 2 years. They take a charge, but the length of time they will produce power is maybe 1/2 to 1/3 of new ones. AA and AAA especially. Am I buying the wrong type ? How to get longer life from these, or any tips on another type of battery. PS - this Forum was the closest I could find to pose this question Link to comment Share on other sites More sharing options...
bigupandchill Posted May 29, 2021 Share Posted May 29, 2021 I feel your pain, brother. I have a draw full of knackered rechargeable toothbrushes that last for ever at home but no time at all here. The heat perhaps? Link to comment Share on other sites More sharing options...
mtls2005 Posted May 30, 2021 Share Posted May 30, 2021 I've been using eneloop (Panasonic) for ages. Hundreds of charges, work very well. I do refresh them occasionally, then replace at 5 years. Think you need a decent charger? I've been using a La Crosse BC-700 for ~ 12 years; still going strong. Easily one of the best tech-ish purchases I've ever made. Also been on the same rechargeable Braun toothbrush for ~ 6 years. Link to comment Share on other sites More sharing options...
BritManToo Posted May 30, 2021 Share Posted May 30, 2021 I use these, they last forever and are incredibly cheap. I think @mtls2005 is right, you need a decent charger. 1 Link to comment Share on other sites More sharing options...
HB9CPW Posted May 30, 2021 Share Posted May 30, 2021 Use it or loose it.. I connect a cheap timer where you can charge 10 minutes every day (mechanical not electronic). So the many devices with batteries will last much longer, also NiMh from HamRadios. Link to comment Share on other sites More sharing options...
canthai55 Posted May 30, 2021 Author Share Posted May 30, 2021 (edited) Use this one - with both AA and AAA batteries of the same brand Charger specs out OK with my multimeter - just seems the batts will not hold a charge any more Edited May 30, 2021 by canthai55 Link to comment Share on other sites More sharing options...
canthai55 Posted May 30, 2021 Author Share Posted May 30, 2021 Just did the AAA a week ago. Put in my Gillette Fusion Power razor and they last about 3 days. Which is less than 10 minutes. When new they would last 7-10 days easy. Waterpik for travel the same. Charge them up fully, last about 3 days. Same as above Link to comment Share on other sites More sharing options...
mtls2005 Posted May 30, 2021 Share Posted May 30, 2021 How old are these batteries? Can you tell if they are real? Or did you get a "deal" on them? "Duracell" is spelled correctly so that's a good sign. Is this the only brand you use? Maybe try a different brand. Link to comment Share on other sites More sharing options...
asiacurious Posted May 30, 2021 Share Posted May 30, 2021 11 hours ago, mtls2005 said: I've been using eneloop (Panasonic) for ages. Hundreds of charges, work very well. I do refresh them occasionally, then replace at 5 years. Don't know if this is still the case, but.... Link to comment Share on other sites More sharing options...
bendejo Posted May 30, 2021 Share Posted May 30, 2021 Good idea to learn about the mAh specs of rechargeable batteries. Link to comment Share on other sites More sharing options...
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