Looking for a Rechargeable mini UPS based on Lithium-ion cr32 Battery or...

[ziomario]

Hello to everyone.

I'm trying to "create" a DiY tablet or maybe it's better to say "mobile" device and I'm looking for a Rechargeable mini UPS based on Lithium-ion cr32 Battery (or any other small battery size) pack at 12V 3000mAh to power on my DiY tablet (it runs with the rockpro rk399 based board).

It should be like this one :

https://www.amazon.co.uk/TalentCell-Rechargeable-3000mAh-Lithium-External/dp/B072HR211P

but it should accept the cr32 batteries (or any other small battery,like the Nokia BL-5C 1020mAh 3.7V 3.8Wh) that occupies a small space inside the case.

Thanks.