Tectra 450mAh AAAA Batteries, 4-Pack AAAA Rechargeable Ni-MH Batteries with AA AAA AAAA Ni-MH Universal Smart Battery Charger for Surface Pen Active Stylus

These rechargeable batteries are very nice to have. Great value for the money, easy to use and charge fairly quickly.

Using this nice AAAA battery in my Kindle fire stylus right now!

Nice small form factor charger set with four AAAA batteries included. This is a NiMH model. Better than NiCd but not as good as the newer Lithium Ion technology. NiMH imseems to be the most common battery tech currently due to its product maturity and value over the oldest NiCd tech, which only stays rechargeable for a year or two if you're lucky. The total voltage is slightly less per battery than "normal" non-rechargeable Alkaline batteries so they will not last long in power hungry devices. If your standard Alkaline batteries lasted a year in the device, expect NiMH to last maybe 30-90 days before recharge.

Perfect for my Tablet Pen. Works perfect. in the long run this will save you batteries. Plus with four in the pack you always have a spare when you run out of juice.

The first one I ordered didn't show up but the 2nd replacement did and it works fine. Charges fine and the batteries are good. It's compact and useful.

Been through 4x recharge cycles so far works as expected

Great

The small size limits the device to AA, AAA, and AAAA size batteries, and the USB-C charger port makes the device perfect for travel. The four AAAA rechargeable batteries are good so far in penlights and my active stylus. Overall, the Tectra charger is a good value and its use is intuitive.

These batteries seem ok. So far so good. I have not attempted charging one from a discharged state yet. I think they are delivered in a charged state. Initial charge time in charger was only a few minutes. I then used the battery in my tablet pen and it seems to work ok. Note that as these are NiMh batteries, even when fully charged, the voltage will be lower than disposable batteries. Consequently they may not be suitable for all applications. I saw one review that stated that the charger as a simple diode and resistor. I doubt that is the case as when viewing the charging current it seems to burst to about 330ma then turns off and repeats cycle. Some detailed instructions explaining how the charger is to be used would be helpful. ie does it stop charging when battery is fully charged etc.

Excelente producto

Parfait pour le stylet de tablette a ma fille

Funcionaron a la primera, espero no tengan fugas y duren. Se pueden cargar con cualquier otro cargador ajustable de 1.2 NiMH o NiCD así que usé el mio de siempre. No he probado aún el cargador incluido. La pluma de la tableta Lenovo funcionó a la primera y sin problemas.

Does the trick