I was wanting to buy a 12v battery that could supply 8A for around an hour. I thought I knew what I was doing and so ordered the following 12v 10Ah Deep Cycle battery.
Yuasa REC10-12 BATTERY Deep Cycle Cyclic SLA 12V 10Ah
I chose deep cycle as from my understanding, they cope better with running the battery down low. And I chose 10Ah as I thought that meant it could supply 10 amps for up to an hour.
However, upon testing this, it lasted about 10 minutes :(
Having done a little more research, I have found out the the 10Ah stated is not as simple as I thought it was, and you have to consider the Nominal Capacity specs to figure out how long you'd actually get.
When I look at other battery data sheets, they specify this data clearly, for example here :
20-hr. (125mA to 10.50 volts) 2.50 AH 10-hr. (220mA to 10.50 volts) 2.20 AH 5-hr. (400mA to 10.20 volts) 2.00 AH 1-hr. (1.5A to 9.00 volts) 1.50 AH 15-min. (4.5A to 9.00 volts) 1.13 AH
But having looked at the datasheet for the battery I bought, it doesn't show the Nominal Capacity? could anyone help me to understand from the datasheet, how I would work out the expected runtime at 8A?