Hi, I have had these made for an Italian solar gate system but they are suitable for many applications.
they are 75mm wide, 75mm deep, 90mm high
so very small for a great little power pack
12volts, 12ah storage.
Average life up to 10 years if charged and discharged properly.
You will need to use 12v electronic multi-stage battery charger that says it is suitable for lithium batteries.
12v 12Ah lithium ion Battery