Hi, Dom!
The Dell Inspiron Mini 1210 has a three-cell battery. There is a really good review of the battery life at this URL: https://www.cnet.com/au/products/dell-inspiron-mini-1210/review/2/
The review says the battery will last about 2 hours if you watch videos non-stop.
If you need to replace the battery for any reason, you should check out the battery replacement guide on this device page!
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