Test/review of Weltool INR16320 750mAh 123A USB (Black-red)

Weltool INR16320 750mAh 123A USB (Black-red)

Official specifications:

  • Core’s Capacity: (typ.) 750mAh

  • Resistance: <85mOhm

  • Output Voltage: 3.0V

  • Maximum Continuous Discharging: 1.4A

  • Charge: 0.33A (Micro-USB port charging??1A?0.5A?Battery Charger?

  • Charging Protection: 4.3±0.05V

  • Discharge Protection: 2.5±0.1V

  • Usage: More than 300 charging cycles, the battery still has 80% capacity.

  • Status Indicator: Red:Charging Blue:Complete

  • Temperature during charging: 0-45°C

  • Temperature during discharging: –20-50°C

  • Size: 16.6±0.2mm (Dia.) , 34.9±0.1mm (Length)

  • Weight: 18.5±0.5g

This is a CR123 substitute with build in USB charger.

There is read and blue leds below the white washer to show charge status.

It is very obvious that this battery is electronically regulated, they voltage stays at 3V with any load up to maximum. There is also a protection build in, that turns off the output when the battery is empty.


There is no perfect rechargeable substitute for a CR123 battery, but this battery comes close.
Differences to a CR123: Battery is 2.6mm longer, voltage will stay at 3V, i.e. battery indicator will not work and equipment that count on voltage drop at high current may get too hot.

Notes and links

The battery was supplied by Weltool for test.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to other LiIon batteries
Table with all tested LiIon batteries

Link please

I do not have any link, but I will tell them I have published the review and maybe they can provide some links.

Thanks for testing!

Interesting battery! If the electronics that regulate the voltage are efficient at that, it can provide good low output runtimes for flashlights that have modern low voltage leds.

My first thought on this is a super tiny direct drive E21A. Should be driven around 900mA +–200 or so. ~1 hour runtime. Could be an awesome and cheap microlight

Thanks HKJ! Very interesting cell.

the question is how much standby drain that internal voltage regulator has
I would guess its a linear regulator with very low standby, but efficiency and heat is not so good

This UB-123A battery is available for purchase at amazon.com

Of course, you can also buy it at banggood and our designated dealers.