I recommend EBL Ni-MH rechargeable AAAA batteries.
AAAA Rechargeable Do Exist
Yes, rechargeable AAAA batteries do exist.
AAAA batteries (or quadruple As) are often used in small devices such as laser pointers, LED penlights, and small headphone amplifiers.
AAAA batteries are not common. However, they do exist in two forms:
- NiCads (Nickel Cadmium) rechargeables
- NiMH (Nickel-Metal Hydride) rechargeables
NiMH has a higher energy capacity and is less toxic than NiCads (cadmium is a potent environment toxin).
Here are all the other commonly available rechargeable AAAA available: