I have a battery which indicates 12V25Ah/10hr. What does 10hr mean here? I guess "hr" stands for "hour". But 25Ah already means if battery is fully charged and if I load 12V 25A (=300W) to it, it should last for an hour (correct me if I am wrong).
- What does "/10hr" mean here?
- How many watts I can load to use the battery for an hour?
Answer
It means that the battery has a capacity of 25 Ah when discharged in 10 hours. 25 Ah is 25 Amps for 1 Hour which is equivalent to 2.5 Amps in 10 Hours.
So if you load the battery with 2.5 Amps it will last 10 Hours.
If loaded with a higher current usually battery capacity decreases so that is why the 10 Hours is mentioned, it results in a higher battery capacity making the battery look "better".
How many watts: simple 2.5 Amps x 12 V = 30 Watts and that for 10 Hours.
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