Re: Discharging a wireless USB keyboard for long-term storage

Mr. Man-wai Chang <[email protected]> wrote:
> On 6/27/2026 6:01 PM, Paul wrote:
>> On Sat, 6/27/2026 12:21 AM, Mr. Man-wai Chang wrote:
>>> 
>>> What's the fastest way to discharge the 
>>> internal rechargeable battery in a wireless USB keyboard?
>> 
>> The 3.7V single cell battery in your keyboard, 
>> loses charge with time, as others have> pointed out, and eventually 
> it will drop to zero.
>> 
> 
> Can I do it without extracting that stupid hidden
> rechargeable battery? Say, via the exposed USB
> Type-C port.
> 
> I know how to play with 1.5V dry, non-rechargeables
> AA battery! The spark is fun! :)
> 
>> Don't worry about it.
>> 
> I am not worrying but fire risk as a result of
> self ignition and spontaneous combusion.
> 
>> If it bothers you, take it to an electronics recycler,
>> they know what to do.
> 
> I don't wanna trust others, nor spending money.
> 

If the keyboard has a lithium ion cell then storing for extended period
above 80% state of charge is indeed dangerous, likewise under 20% state of
charge (or more particularly below approx 3.2volts) risks permanent damage.
If the keyboard is able to report state of charge then best bet is to run
it down to somewhere between those limits before storing.


-- 
piglet