I forgot recharging the HP Prime. The akku is now absolutely empty and the calculator don't start up any more. The display remains black. What can I do?
HP Prime recharging
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10-24-2013, 11:58 AM
10-24-2013, 12:52 PM
I don't know about the Prime specifically, but many digital tools with lithium batteries won't turn on until the battery has a certain minimum charge. For example my old phone, if I let it discharge completely, then I had to plug it to the charger for about 10 minutes before it would even turn on.
10-24-2013, 01:05 PM
Simply plug in the charger and wait for half an hour until the voltage level is sufficient for powering up. The Prime unes a rechargeable lithium-ion battery. The common standard for these batteries is a built-in circuitry that prevents discharge below a certain limit (and overcharge as well, for that matter) to protect the battery against damage. At that point the device is turned off and will not turn on again until a safe voltage level is reached again. Dieter
10-24-2013, 02:53 PM
Thanks for explaining that. Today in work I had a query about a device (not an HP calculator but using that type of battery) which we had supplied to a customer. Our test/development unit in the office refused to turn on until the charger had been on for about 5 minutes (their phone bill not ours!) Now we know why.
10-24-2013, 06:08 PM
Li-Ion batteries do not appreciate being left below a certain threshold voltage , you can damage or at best wipe lifetime off the battery. |
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