The E-Flite 2s (7.4V) 400mAh 30C LiPo Battery is a direct replacement for the Blade Micro AH-64 Apache RTF (BLH2500) and BNF (BLH2580).
Additionally this can work in many other applications which support this battery criteria.
Connector Type: JST
Wire Gauge: 18 awg
Length: 1.625 in (42mm)
Width: 1 in (26mm)
Height: 0.50 in (13.0mm)
Maximum Continuous Discharge: 30C
Maximum Continuous Current: 12A