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Home › Batteries › 16650
Rechargeable flashlight battery

16650 battery

1What it is2Safety3Other names4Facts5Buy it
  1. 1

    What it is

    16650

    16650 is a rechargeable flashlight battery, a bit bigger than an AA. It gives 3.7 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.

    INR16650ICR16650
  4. 4

    Quick facts

    Size
    A bit bigger than an AA
    Power
    3.7 volts
    Keeps in a drawer for
    About 3 years
    Rechargeable?
    Yes
    Found in things like
    Slim 18650-style flashlightsPower banks
  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 16650
    See results on Amazon →
    Amazon searchMulti-packs from any brandSearch Amazon for 16650 multi-packs
    See results on Amazon →
    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell 16650
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See it at real size

16650 next to a US quarter and an AA battery. “Real size” matches your hand once your screen is set up in Measure it.

16650US quarterAA

What do the letters mean?

Battery names are a code. Here’s how to read 16650:

1616 mm diameter
65065.0 mm length
Li-ion3.7V rechargeable

The same battery from each brand

BrandTheir name for it
Official name16650

Exact measurements

Width
16.0 mm (0.630 in)
Length
65.0 mm
Voltage
3.7V (empty at 2.5V)
Energy stored
2000 mAh
Weight
—
Made with
Lithium-ion rechargeable
Works between
-20 … 60 °C
Official code
16650

Questions people ask

Is 16650 the same as INR16650?

Yes. They’re the same battery with different names. You might also see INR16650, ICR16650.

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.

16650
16650Rechargeable flashlight battery
Search Amazon for 16650As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

Something wrong or missing? Tell us

1What it is2Safety3Other names4Facts5Buy it