These are the specs for the Tekkeon My Power Specifications
Weighs just 11.8 oz (330g)
Size is 3.28” (W) x 6.80” (L) x .92” (D)
Rechargeable lithium polymer battery
3 hour charging time
Supports multiple voltages (3, 4.5, 5, 6, 7.5, 9, 12, 14V)
36W output power
Black and brushed silver
Usually, on these multiple voltage batteries, they seem to quote the Ah at the lowest setting. Looks like it has less power than the Wallys.