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Home › Batteries › 38140
Rechargeable flashlight battery

38140 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    38140

    38140 is a rechargeable flashlight battery, much bigger than an AA. It gives 3.2 volts.

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  2. 2

    Safety first

    This one is rechargeable

    It gives more power than a normal battery. Only use it in things made for it.

  3. 3

    Names you might see in the store

    All of these are the same battery. Any of them will work.

    IFR38140
  4. 4

    Quick facts

    Size
    Much bigger than an AA
    Power
    3.2 volts
    Keeps in a drawer for
    About 3 years
    Rechargeable?
    Yes
    Found in things like
    E-bike packsPortable power stationsHigh-capacity flashlights
  5. 5

    Where to buy it

    As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer 38140
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for 38140 multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell 38140
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See it at real size

38140 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

38140US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read 38140:

3838.0 mm diameter
140140.0 mm length
Li-ion3.2V rechargeable

The same battery from each brand

BrandTheir name for it
Official name38140

Exact measurements

Width
38.0 mm (1.496 in)
Length
140.0 mm
Voltage
3.2V (empty at 2.5V)
Energy stored
12000 mAh
Weight
—
Made with
Lithium-ion rechargeable
Works between
-20 … 60 °C
Official code
38140

Questions people ask

Is 38140 the same as IFR38140?

Yes. They’re the same battery with different names. You might also see IFR38140.

How long will a spare keep in a drawer?

About 3 years if it stays cool and dry.

Can I recharge it?

Yes, it’s rechargeable. Only charge it in a charger or device made for it.

38140
38140Rechargeable flashlight battery
Search Amazon for 38140As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

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1What it is2Safety3Other names4Facts5Buy it