EBL Rechargeable AAAA Batteries 2 Counts 400mAh with Smart AAAA Battery Charger - High Capacity Ni-MH 1.2V 1200 Cycles Surface Stylus Pen

Worked perfectly for my style is pen for my surface pro. Thank you.

There simple and straight forward. Plug in the charger, pop in the battery, and charge. They charge quickly. Not enough use yet to say how long they last. Everything came as described.

Works terrific

I bought this to charge EBL AAAA batteries for a Surface Pro pen. I took a star off because the contacts aren't the right length for the AAAA battery. I almost broke it trying to make it fit as I thought it should fit. Then I noticed that the positive contact is corrugated. The battery fits if placed at an angle, and it does charge. I would much prefer that the battery snap down for a more positive connection to the contacts. Otherwise, the charger form factor is fine, very portable. It would have been a plus if the maker had provided a carry case. I'll probably put it in a baggie with the second battery which I've charged but am not currently using. I would still buy this, but this would have been good to know up front. In the next edition I would suggest spring loading the negative contact so that it can slide back to accommodate AAA and AA batteries for a higher quality connection with all sizes.

Perfectly sized charger adding great value and functionality. The battery capacity has been solid, with a long battery life.

I didn't realize how hard it was to find AAAA batteries in the store. When I seen these and they were rechargeable, im like sure why not. So far so good. And the ease of charging is great!

Charger works as designed and seems durable.

This is a great product to have for nyone who has a styles pen that user AAAA batteries.