Lightest cheapest power banks. From 24 grams as pictured, They double as chargers for 18650 batteries . I recommend (eg genuine) Panasonic NCR18650B 3.6V 3400mAh (flat top) 6.7 amp discharge capacity. These batteries weigh a bit over 40 grams each, so the single bank pictured is 71 grams and the four battery version is 245 grams complete. The 2 Cell 6800 mAh US$1.53 = 114 grams complete with batteries.
I sourced genuine Panasonic cells for around $8 ea locally (in Oz). The 8 cell model has selectable voltage out which might be handy. The 24 watt Xionel solar panel featured in the last post will charge two of these batteries on a bright sunny day which would be about enough to charge your phone twice.
8 Cell 27200mAh US$9.90
6 Cell 20400 mAh US$4.85
4 Cell 13600 mAh US$2.11
2 Cell 6800 mAh US$1.53 = 114 grams complete with batteries.
1 Cell 3400 mAh US$1.07
Soon these will be available using the 21700 battery which has a higher mAh rating (5000 per battery but slightly heavier). This little 5000 mAh beauty from Litesmith is US$22 (Sep 2023) and 73,5 grams. It should easily charge your large (4000 mAh) Iphone or etc.
See Also :
PS: They keep improving these things. This two cell one is very nice.
Hello,
I’m looking for a 18650 bi-directionnal battery. Exactly the same as the Litesmith you linked, but for a 18650 instead of a 21700. Is this what you were sharing ? If so, mind telling me where to find them ? Thank you very much.
Just follow the links. Cheers, Steve.
Steve I was looking at these yesterday, so this advice is a big help.
Thanks and i hope the fires are under control.
Ross
Yes thanks Ross. All good.