Lithium Ion Battery Pack - 2.5Ah (USB)

We've taken the classic, portable, rechargeable lithium ion battery pack and tweaked the design to make it amenable to low current applications. While similar power banks are typically designed to power off automatically at lower currents, this battery pack will continue to operate if your device is drawing a mere 20mA and over! Just connect your device to the USB-A port on the battery pack and you're good to go! To recharge the battery pack, just plug it into your computer or phone charger using a USB micro-B cable (not included).

This particular battery pack has a 2,500mAh capacity and can source 1,000mA at 5VDC.

Note: This item may take longer to process due to battery installed in the equipment and therefore does not qualify for same-day shipping policy. Sorry for any inconvenience this may cause.

Lithium Ion Battery Pack - 2.5Ah (USB) Product Help and Resources

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

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Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Looking for answers to technical questions?

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  • kzadar / about 5 years ago / 2

    Looks like a great little device except for the shutdown while charging: 7.1.4 The output will be shut down automatically under charging status. (from the data sheet)

    • BerenV / about 5 years ago / 1

      Yeah, that would be unfortunate. The other power banks like this that I've seen (even the much cheaper ones) all allow simultaneous power input/output.

  • StevenG / about 5 years ago / 1

    We bought five of these to power a proof-of-concept. The lack of visible LED's combined with the tendency to turn off unexpectedly makes them hard to use for this purpose.

Customer Reviews

2 out of 5

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3 of 3 found this helpful:

Shuts down at lower currents despite description

My devices run at 22ma and these battery packs (bought a bunch of them) shut down after 16 seconds.

Sigh. I'll be giving these away as gifts for friends and family with less precise needs.

Otherwise seems to function well, just not as advertised or as needed.


Am I doing something wrong?

I've left it charging for upwards of an hour after getting seemingly no current out from the device.

Open-circuit voltage is 2.5V, and during testing across a 1k Ohm resistor (carbon-film, quarter-Watt), as well as with a 10k Pot, it jumps to 5V (as-expected).

Unfortunately the most current I can seem to get out of this thing is about 220mA when my test-load is at around 5-10Ohms. For the record I was hoping to power some of the Heating Pads (resistive loads of 8-10Ohms each, rated for normal performance at 5VDC@600mA each). I was hoping to power those pads in parallel. The heating pads work quite well when powered by my adjustable benchtop supply (which is capable of providing around 10A at 30VDC max).

I was really counting on being able to use that promised 1000mA. At time of writing I'm trying to charge it some more, but out of the box, and based on the other comments, I'm not too impressed. It sucks all the more because this is a great size, and is charged AND discharged through USB.

Additionally I've been charging it with the power supplies provided by HTC for the Vive wands which conveniently provide the exact same DC power output this is battery rated to consume of 5VDC @ 1A.