For portability and because of all the posts about lights flashing when charging (because of noise from bad charge brick or lightbulb around the board).
I bought and tested a power bank. This has a number of advantages. First and foremost, you can charge anywhere, even if you don’t have a socket nearby. And with the Lazy Suzan you can charge and still easily rotate your chessboard, which is not possible or easy with wired charging at a socket. This works very well. The power bank is Amazone’s own brand with a dedicated website. Shipping is via Amazon.
It’s a [New] INIU Cougar P63-E1 Power Bank Smallest 100W 25000mAh [New] INIU Cougar P63-E1 Power Bank Smallest 100W 25000mAh
According to ChessUp FAQ, ChessUp 2 battery is a 4600 mAh Lithium polymer. Nominal voltage of LiPo would be 3.7V, which makes for a 17 Wh cell capacity.
The Iniu P63-E1 is 25000 mAh LiPo and should fully charge ChessUp 2 up to five times. For various purposes ranging from charging laptop, phone, camera and ChessUp 2 on the go, I use an Omnicharge Omni 20+ battery (71 Wh, 4 x ChessUp 2) and a Satechi Quatro battery (38 Wh, 2 x ChessUp 2). They both work with ChessUp 2. It really irks me how most battery sellers advertise mAh when they should advertise Wh. Also you have to make sure the battery can output at least 20W as per ChessUp FAQ instructions. I have a readout of 8.5 W charging when the board is off and 10.5 W when the board is on.
That was at over 80% battery level. At yellow (low) battery level, it charges at 9.7 W with board off and 13.5 W with board on. So the 20 W minimum spec for charging is justified
Thanks for the advise on this product, just ordered one for myself, I find the design really well done with high capacity and small form factor, exactly what I was looking for
