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battery load tester Battery_guide_2

April 29, 2011

“Rechargeable Alkalines” (“RAM” as they’re called) can be found in standard-size cells and perform very like today’s Alkalines including a superb shelf-life (years), but RAMs also share the performance limitations of normal Alkalines in accordance with NiMH in high-drain devices. This will not be an overriding factor though, because RAM’s would do in the pinch, and could become more economical than jumping into Lithium batteries as backups to NiMH. The comprehensive forensics education NiMH and RAM’s in a household often is the best overall solution: NiMH for high-drain devices; RAM’s for anyone lower-drain devices plus an economical backup to NiMH. Also be aware that only a couple of chargers today are that will work with RAM chemistry, so its own charger should be used.

NiCad: NiMH has clearly superceded NiCad (nickel cadmium) rechargeables for a lot of applications, but NiCad continues to be the rechargeable of for high-torque devices for instance power drills.

So here is a test: What’s best while cold-soaked inside of a high-drain device, RAM or NiMH? I’m guessing frequently . a tie, yet the smartest choice is almost always to possess some non-rechargeable Lithium cells for backup in winter ops with high-drain devices (camera, MP3, Gameboy, etc.). So, it’s NiMH for high-drain devices, except flashlights where non-rechargeable Lithium’s reign there isn’t any long shelf-life, while RAM’s perform like Alkalines by using a great shelf-life and superior low-drain performance, and may even also perform the duties of NiMH backup inside a pinch.

type
device
shelf-life
recharge ability
AA capacity
best conditioning practices
NiMH
high drain
8 weeks
rechargeable (500+ times)
2300mAh
3-5 initial, then seldom
NiCad
high torque
4 months
rechargeable (500+ times)
1000mAh
every charge cycle
Lithium
high drain
A decade
non-rechargeable
unknown
n/a
Lithium ion
high drain
months
rechargeable
no AA/AAA

RAM-Alkaline
lower drain
Five years
rechargeable (50+ times)
unknown
never; special charger
Alkaline
lower drain
7 years
non-rechargeable
2300mAh
n/a

A shorter list of the ideal AA-size rechargeable batteries would include (because it helps): Powerex, Sanyo/Energizer/Kodak (same battery tester), Jetcell, GP, Lenmar, Duracell, Quest,

battery load tester

, Ansmann and Nexcell.

capacity
4xAA price
endurance*
2300mAh
$19
2.8x
2200mAh
$18
2.7x
2100mAh
$15
2.6x
2000mAh
$13 to $15
2.5x
1850mAh
$10 to $13
2.4x
1800mAh
$ 8 to $11
2.3x
1700mAh
$ 7 to $ 9
2.2x
* endurance = originating from a full charge these cells last ‘x’ times longer than Duracell Ultra (non-rechargeable Alkalines) in high drain devices (surveillance camera, MP3, Gameboy, etc.). Note: NiMH batteries self-drain close to 2% of these remaining capacity daily at room temperature. As you can view through the embedded-spreadsheet (double click to switch the ‘days’ value), after about two months of non-use coming from a full charge, NiMH cells has no endurance than the usual new couple of Duracell Ultra’s. For superior performance, freshen-up your NiMH batteries within days of intended use.

Chargers

sd1e2q1

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