fereciti.blogg.se - How to charge a nextbook tablet without a charger

Seconds to allow for a soft shut down in case the charger is II) OPTIONAL - the smaller battery or supercapacitor shouldĪct as a temporary buffer to power the tablet for a handful of.If necessary, a custom charger (or to be more precise, power supply) can be built form scratch (either with a 7805, LM317 or a DC-DC converter) - there are no problems in finding a schematic for that.

Let's say that the main purpose here is to avoid a ka-boom. In this case a smaller battery or supercapacitor (or even capacitor) will only act as a buffer to protect the mobo (this should be easy), while some other circuit might be needed to fool the tablet in believing there actually is a battery and it is being charged (this might be tricky).

I) MANDATORY - operate the tablet while connected to the charger with no battery inside.

The circuit might use a smaller battery and or a supercapacitor or some other magic gizmo to do what follows (note: only point I is strictly required): To use a suitable circuit that will simulate the battery presence so that the tablet can be run when attached to the charger (we assume that with the original battery fully discharged the tablet runs ok). Only, and leaving the ballooned battery in is a bit too risky. Not possible to run the tablet without a battery with the charger

b) no replacement battery available from the manufacturer or seller otherīatteries of similar capacity are too big to fit.

Has ballooned to the point it popped open the chassis

a) A tablet (for which we assume we have no schematics) whose battery.

In order to make my question the more general possible, since I believe many will benefit from advice on how to tackle this problem, I'll have to be overly wordy. This paves the way for a new need for us couch potatoes: to be able to use a tablet when the (Li-Ion) battery is no more reliable and has to be taken out (and no replacement is available). Tablets have gone mainstream a few years ago, and Li-Ion batteries have a lifetime of a few years only.