The high tech Tadiran SL-760 AA 3. It should be noted that this is a specialist battery and not for regular devices; only use in devices requiring 3.
Tadiran Lithium Battery. LS-750/S 1/2 AA 3,6V Volt, LS14250
Tadiran Lithium Battery. LS-550 replacement 1/2 AA 3,6V Volt,
3x TADIRAN AA/R6 LS 14500/SL-760 3.6V LITHIUM BATTERIES 2200 mAh HIGH ENERGY NEW
Tadiran SL-750/T 1/2 AA 3.6V LS14250 Battery LS-14250 R6 1/2AA SL750 Solder Tags
2x LS14500 3.6V Lithium 2600mAh 2 Pack Batteries Li-SOCl2 LS-14500 LS 14500
Epever® MT50 Remote Meter LCD Display Compatible with MPPT Solar Panel Charge Controller Regulator Tracer - LS BN, Tracer, LS, BP, BN, eTracer, Itracer