Timeline for Can I replace my 11.55 V laptop battery with 15.4 Volts
Current License: CC BY-SA 4.0
8 events
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| May 16, 2022 at 15:22 | comment | added | Peter - Reinstate Monica | @PeterCordes But the graph in the accepted answer represents a dumb charger: Charge essentially at constant voltage, except that you cap the current (which happens automatically with the right charger dimension). | |
| May 16, 2022 at 15:19 | comment | added | Peter Cordes | @Peter-ReinstateMonica: lithium-ion batteries pretty much rule out dumb chargers for fire safety reasons. A damaged laptop battery taken on an airplane is a serious danger, and yes, Li batteries do catch fire at times other than being charged. The only conceivable kind of dumb charging would be "charge at x Amps until y Volts", constant-current (and you detect "full" by the voltage across the battery), but real chargers need to back off the current when the battery is close to full. See some V and A vs. time graphs on electronics.SE | |
| May 16, 2022 at 9:57 | comment | added | Peter - Reinstate Monica | @DanielB Well, battery sizes could be easily accommodated by dumb chargers ("charge at x V until full"). Voltages are more delicate. | |
| May 16, 2022 at 9:54 | comment | added | Daniel B | @Peter-ReinstateMonica Yes, absolutely. There are (were) ThinkPad models that could be used with various battery sizes. This battery, while internal, appears to use a similar connector. | |
| May 16, 2022 at 9:31 | comment | added | Peter - Reinstate Monica | I'd be also concerned with the charging -- if the charging electronics aren't prepared to produce the voltage or if they refuse to charge with more than the original nominal voltage 11.9V + x in order to prevent battery damage, they wouldn't fully charge the 15.4V battery. Do you know anything about how intelligent the charging is these days? Do laptops communicate with the battery, say, querying voltage, temperature and max charging current? | |
| May 16, 2022 at 6:46 | comment | added | jpa | It's entirely possible that the laptop hardware supports two battery voltages. But yes, your answer applies in the general case. | |
| May 15, 2022 at 17:00 | comment | added | Ramhound | Most trustworthy seller(s) will also provide a list of devices that the battery is compatible. Now those lists are normally accurate, but obviously, the seller can't test every device so they are compatible on paper. The point is that a trustworthy seller will provide this list and offer a return policy. You should also avoid the "too good to be true" deals. There is a reason they are cheap, they are batteries from China, likely extremely old stock or the battery reports a fake capacity. | |
| May 15, 2022 at 15:57 | history | answered | Daniel B | CC BY-SA 4.0 |