20PCS AAA to AA Battery Adapter Converter Holder Transparent Cases with Metal Contacts on Bottom for

This converts the AAA battery into an AA battery and replaces the AAA to AA battery adapter converter case. This battery adapter case made of durable ABS, metal bases and tips for a solid electrical connection will not warp or bend when the springs apply pressure on it when you insert them into your device. The interior of the adapter fits snugly on an AAA battery, so it does not move or loosen after insertion AAA batteries can be converted into AA batteries with the AAA to AA battery adapter, they play the functions for energy saving As it can also be used for other electronics in case you run out of AA batteries, this battery conventor is perfect for emergency situations. Besides, with this battery converter, you may not need to buy too many AAs or take too much travel. Simply pull the case apart to disconnect, insert an AAA battery to match the poles and then press it together to close. A normal AA battery can be easily and solidly converted