(These batteries are shorter than full size AA - only 30mm long).
4 x 2/3AAA (Two Thirds AAA 30mm) Solar Light Batteries Rechargeable 1.2V NiMH
4 x Buyabattery 2/3AAA (Two Thirds AAA) Rechargeable Solar Light Batteries 1.2V 200mAh NiMH 2/3-AAA Length 30mm Diameter 10mm
Granicell 8 x AA AAA Rechargeable Batteries, 4 x AA 2800mAh High-Capacity and 4 x AAA 1100mAh High-Capacity, 1.2V Ni-MH Battery, Rechargeable Up to 1300 Times
HiQuick 8-slot AA AAA LCD Battery Charger, 5V 2A Fast Charging Function, Type C Input with 4 x 2800mAh AA and 4 x 1100mAh AAA NI-MH Rechargeable Batteries, Battery and Charger Set
Venom Pro Charge Plug In Wall Battery Charger plus 4 x AA & 4 x AAA Rechargeable Batteries
