A five-year old laptop made “portable” again…. You surely know that Li-Ion batteries won’t hold their charge after two or three years. Why pay 90 EUR for a new battery pack? Just a quick voltmeter setup, a cordless drill battery and we’re off. Just make sure that the battery voltage is over 12V, or else the laptop may behave irrationally. (NOTE The battery used here is a Ni-Cd type, rated 14V 1.2Ah; however the capacity of 1.2 Ah is NOT enough for this setup. You need at least 3-4Ah to do something useful – my battery did last just 30 minutes, the voltage then dropped to 10V and the laptop froze due to undervoltage.)
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