Help! Please compare the power capacity of these 2 rechargable batteries and tell me which has higher capacity?
2 laptop external batteries:
I am looking at 2 separate rechargable battery units which can be charged and each can be used (as well as for the usual handheld devices + phones) as a spare, external laptop computer battery.
One of the items is a rechargable battery alone. And the other item is a rechargable battery and solar panel which can charge the battery.
I only want to compare the battery capacities – so please disregard the fact that one of the items is more than just a battery – it is just the battery capacity of each item I am interested in.
http://cgi.ebay.co.uk/Solar-Charger-Battery-for-PC-Laptop-Mobile-Phone_W0QQitemZ280378903393QQcmdZViewItemQQptZUK_Gadgets?hash=item4147e28b61&_trksid=p3286.c0.m14
http://cgi.ebay.co.uk/Extra-laptop-Battery-for-16V-Universal-Li-Ion-133-Watt_W0QQitemZ270438389595QQcmdZViewItemQQptZUK_Computing_LaptopsAccessories_LaptopBatteries?hash=item3ef762575b&_trksid=p4634.c0.m14.l1262
I sat through physics at schools and passed the exams years and years ago but I can’t remember anything and I am so slow it would take me weeks to get back into working things out without confusion.
The capacity of one battery is shown in mAH and the capacity of the other battery is shown in WH. I don’t know how to compare them.
Please help. I’m not so interested in how to work it out right now – just asking for someone to do that – to put the capacities of the 2 batteries in a way that can compare them as exactly as possible (not to rely on the suggestions given by retailers that the battery powers a laptop for 3 hours or whatever). So please can you give the capacity in the same units?
Also, you can explain so I can get around to knowing how it’s worked out when I am more with it – I’d appreciate that a lot.
My laptop would take the input voltage from the power source – 19 volts, or I guess the next selection above that where a battery doesn’t have a 19 volts setting (so that seems to be 22 volts with the battery that’s also a solar charger).
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