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XTARJUNE03
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Note: Pick the Black coloured one, as it is the listing with the revised 2023 model which has a more secure fit for smaller sized batteries.
~A$27 after 3% MasterCard International Transaction Fees.
Update: Black one sold out, if you have longer length batteries (than standard 18650) you can risk it with the older model, as the only thing that changed between the two versions is the inclusion of a removable battery spacer (which you'll have to remove for longer batteries anyway) and a clip, also related to small batteries.
This is a Powerbank/Charger combo from XTAR, which supports charging/using power from 21700, 20700, 18700 and 18650 Batteries and has a battery percentage/voltage screen. It can also supply power to low-drain USB devices such as an ipod shuffle's charging cable (bad example but I had this problem with other power banks that automatically detects when to release power, not naming any names)
Apparently pass through charging also works so it may be a nifty little UPS for a raspberry pi/other board.
I found this after doing some research earlier in the year on powerbank/ battery charger combos, found this, and waited for 2 conditions to be met:
1. prices to decrease (which it did from ~$32)
2. The revised 2023 model (which fits batteries more securely due to the spacer and rotating clip) to be listed. (sort of, as when I asked the seller they replied that the black coloured powerbank was the newer model, and they were selling old stock of the other coloured powerbanks before they update the listing)
It's not a all time low, I know but it seems like a good deal as it's very close to the all time low (probably because I was waiting so long lol). I'll update this page if prices change.
There's a coupon that can be used to take US$2 off (XTARJUNE03). 8% discount (US$1.20) also applies when using AliExpress coins so you can use your massive coin stash earned from the other deals. The price I put in the title was using the coupon without any other discounts, and I rounded the conversion rates up just to be safe.
P.S: mods/anyone please double check the price for me as aliexpress has many confusing discounts/taxes (e.g seller discount) and I might get the price wrong for other users without coins/discounts.
Comprehensive review blog that I found useful
P.P.S: Batteries not included.
I'm happy with my red one, don't have problems with batteries falling out
As OP said, good for lower power devices such as led strips, this model only turns off when current drawn drops below 50mA for 90 seconds (the PBS2C is 10 seconds under 100mA)