Description: Power on the go? Why didn’t you ask? We’ve got plenty! These portable, rechargeable lithium-polymer battery packs are simple, compact and make for a great way to power your widgets in the field. Best of all, they’re dead simple to operate: Just connect your device to the USB-A port on the battery pack and press the power button. An LED will alert you to the charge level of the battery and start powering your device. The battery pack will turn off on its own when your device stops drawing power from it. To recharge the battery pack, just plug it into your computer or phone charger using a USB micro-b cable.
This particular battery pack has a 1000mAh capacity and will source 700mA at 5.5VDC.
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.
Dimensions: 13.5 x 54.2 x 65mm
Based on 1 ratings:
Some feedback — bought two of these to power a couple of ESP8266 parts; works fine. As noted by others, these have a boost converter that will waste the power if left on so they have a shutoff circuit that powers down at some minimum load. A quick-n-dirty test of mine showed that with a 75 Ohm load (~66mA) they stayed on while a 100 Ohm load (~50mA) they shut off. YMMV*.
I performed no capacity test but assume they are close to their ratings of 1 AH or so.
One thing I also did not test and this is a far more critical test than capacity is whether or not they shut off at low battery. Lipo’s die if discharged too far so this is worth doing; if I do, I’ll update this.
All in all, quite happy with this product so far.
*What is the metric equivalent of YMMV? “Your kilometrage may vary”?