Litesmith have recently utilised the 21700 Lithium battery to make perhaps the most compact and lightest (at 73.5 grams) 5000 mAh power bank. These batteries are available to 5800 mAh so expect some improvements still.They are selling for US$22 (Sep 2023). This size should allow you to charge (once) the largest mobile phone around (usually […]
Another interesting idea for charging those 18650 (or etc) lithium batteries (and the like) Only 20.5 grams. Weltool version, Folomov version from approx US$12.69 (Feb 2018) To convert it to a 3600 mAh power bank you would attach it eg with cable or connector to something else, say your phone. See: https://www.amazon.com/dp/B075F4MD1G NB the 18650
The Nitecore F2 Charger: 46.5 grams plus battery weight, eg two X 18650s at 48 grams each = 6800 Mah of charging for a weight penalty of 142.5 grams (not bad), but if you add a second pair of batteries (96 grams) you have 13600 Mah for 238.5 grams which is just about unbeatable. The
Kodak 5200 mAh Powerbank: $15 at Safeway/Woolworths 150 grams (139 minus cord). This is cheap enough you could just use it once (instead of 500X!) then throw it away! Doesn’t the world just keep getting better and better? Of course there are lighter (if not cheaper) options. For example, I usually carry a spare battery
