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Rechargeable AA batteries.
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Home › Forums › Gear Forums › Gear (General) › Rechargeable AA batteries.
- This topic has 11 replies, 9 voices, and was last updated 5 years ago by Gary Dunckel.
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Apr 17, 2019 at 1:49 am #3589169
I need 4 AA rechargeable batteries for two Motorola citizens band radios. I have the base station charger for the radios. (it won’t properly charge Li-ion batteries, even the 1.5 v new ones)
Energizer and Panasonic Enerloop rechargeables look good and are readily available. Â Any others I should take a look at?
Apr 17, 2019 at 1:54 am #3589174BTW, I’m assuming these are all Ni Mh batteries and all have about the same amount of battery life before needing a re-charge.
Apr 17, 2019 at 2:06 am #3589177Eneloop Pro rechargeables are the best, IMHO. They seem to hold their charge longer than most other rechargeables.
Apr 17, 2019 at 1:13 pm #3589223I’ve used eneloop in my GPS. Every couple years they start to not last as long before they need recharge, especially if it’s cold.
I’ve used other Nimh and didn’t think they have as much capacity as eneloop.
Another thing is that they slowly discharge even if I’m not using them. I try to charge them within a week or two of using them. Eneloop are supposed to be a little better.
Apr 17, 2019 at 3:53 pm #3589247I use Eneloop Pro rechargeables in my GPS and get 18 -19 hours of usable charge.
Apr 17, 2019 at 7:52 pm #3589299+2 on the Eneloops.   I rarely buy lithium anymore.  Just be sure to re-charge them– just prior to  your next trip.
Apr 17, 2019 at 9:30 pm #3589310+2 on the Eneloops too. I use them everyday, so lithium would be really pricey. I also have found that slower charging makes them last longer along with “refreshing” them every few months. i like the La Crosse Technology BC700-CBP Alpha Power Battery Charger . it refreshes the batteries as well as does a slow charge.
Apr 17, 2019 at 11:07 pm #358932415 years ago I did a geeky study of the performance of flashlight batteries, and also that of the various types of bulbs. I kept track of run time of each flashlight/battery combination, at temperatures of 70* F (in the house) and also at temperatures of ~+32* F and 0* F on the patio. The batteries I tested were Duracell alkaline, Energizer Ni-MH rechargeables, and Energizer lithiums. I found that the Duracell alkalines petered out at about +32* F, the rechargeables at about +30* F, and the lithiums not at all even at temperatures down to 0* F.
The rechargeables worked best if I had charged them up the day of the test. They did have a significant loss of charge over 1-2 weeks (self-discharge). I assume that the technology of rechargeables has improved over the past 15 years, but I still rather doubt that they will perform well at much below freezing temperatures. My summer stint at McMurdo in Antarctica convinced me that the only battery worth using in severe cold was a lithium one.
Apr 17, 2019 at 11:35 pm #3589326https://visualsproducer.com/2016/03/31/panasonic-eneloop-pro-batteries-real-world-tests/
(low discharge, rated to -20 c)
Apr 18, 2019 at 4:01 am #3589365If only someone would market lithium-ion pencells the same size as AA and AAA. Thought they did, and bought a few batteries that turned out to be useless for AA and AAA applications. Still one more reason to buy a Petzl Hybrid and use the Core battery pack that is basically three AAAs wired together in a package. Probably electrical engineers on BPL will know more about this.
Apr 18, 2019 at 6:50 am #3589372The nominal voltage of Li Ion is 3.6 v and that is why a AA or AAA sized version does not work on equipment designed to work at around 1.5v.
There is one brand that sell a 1.5v Li Ion rechargeable , called Kentli.
They have a circuit inside each cell to reduce the voltage.
My suggestion would be to check very carefully that they will work in your particular device.
Apr 18, 2019 at 2:02 pm #3589384” low discharge, rated to -20c”
Wow, Franco, the rechargeable technology has vastly improved since I did my testing 15 years ago! I might jump in on the Eneloop Pro cells, to try them out. Trouble is, I’ve been stockpiling Energizer AA and AAA lithium batteries for several years, and I might currently have a lifetime supply of them. I do like the fact that they are likely the lightest cell available, they have a great output, and they have a 20-year shelf life.
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