Boslipo (Tactical Version) 11.1v Cutlass

Sold under the name "Cutlass," this Boslipo Tactical Version 11.1v pack is shaped specifically for the Lehui Vector and other blasters with a small battery compartment — not the standard buffer-tube form factor most 11.1v packs use. It does not fit into M4A1-type buffer tubes, so measure your compartment before ordering rather than assuming any 11.1v Boslipo will drop straight in.

Battery measurement is 40.8mm (L) x 17.52mm (W) x 21.98mm (B) — a compact, blocky profile rather than the long slim shape used in rifle-style stocks. If you're running a Vector or similar compact-compartment build and your current 11.1v pack won't seat properly, this is the size to look for. Pair it with a balanced charger rated for 3S lipo and check polarity and connector against your existing setup before first use.