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

They work fine

When I lost this charger during travel, I was so glad to find it again. It's a necessity for me to keep my stylus running. It charges well. Price cannot be beat.

This EBL Rechargeable AAAA battery set with charger is very convenient. I use AAAA batteries with a stylus, and used to swap them every month or so. I finally decided to bite the bullet and get a rechargeable set, and have never been happier with the performance.The USB charger is very easy to use - simply insert the battery and plug it into a spare charging port! The fact that there are 2 batteries means I always have a spare available and never have to wait for the stylus to recharge. It really does reduce the amount of batteries I have thrown out, so it's both convenient AND better for the environment!

Práctico, compacto, tal como se muestra en la foto

Update: Seller sent me new batteries with a working charger. Great customer service and assistance. Updated review to reflect the help. Thank you!Old :Batteries were dead when they arrived. Charged them both up with the included charger, and there was no light or indicator that they were charging. Waited 12hours, and the light was green which I assumed meant it was fully charged. Replaced the battery in my surface pen, and it was still unresponsive. Both batteries seem to be DOA and wont hold a charge. Unfortunately I am out of the return window to return them.

So far, so good. Using the battery for my Fire Stylus. I don't know if the charger is suppose to be a quick charger, however, it does charge rather quickly.

Daughter got a pixel book and pen.The pen uses one of these AAAA batteries and came with one but it was almost dead.Alkaline AAAA are difficult to find and rather expensive.These NiMH are only slightly shorter than AAA so I did not need a specific charger for them.These batteries are LSD (low self discharge) so are appropriate for devices that would not need replacing batteries often. Regular NiMH can lose their charge after a few months even if not used.I also liked they came with a plastic case to store them.Some older reviews mention the batteries leaking.I have not had that experience yet but will update review if it happens.

Works very well, the batteries charges with good performance on the laptop pen.