Nuprol 1550mAh 7.4V Lipo Stick Mini Tamiya

Not every gearbox wants 11.1 volts. An older mechbox with original trigger contacts, a rental-fleet gun, or anything running a standard motor and a light spring will live longer and behave better on 7.4v, and a two-cell LiPo still gives you the flat discharge curve and low self-drain that makes lithium worth having over nickel.

Of all these packs this is the one to pick when space is the problem rather than runtime. At 16 x 18 x 95mm and 57 grams it is less than half the weight of the 11.1v triples, and it goes places a three-cell stick simply will not — slim handguards, pistol-calibre carbines, compact PDW bodies.

Capacity is not the compromise, either. 1550mAh is the largest of the Nuprol sticks here; the 11.47Wh total is lower than a 3S pack because the voltage is lower, not because the cells are small.

Specifications

Good to know before you buy

Choose 7.4v deliberately, not by accident. On a standard gearbox it will feel softer than an 11.1v pack and the rate of fire will be lower. That is the trade you are making in exchange for an easier life for the trigger contacts, the piston and the gears.

Two cells still means balance charging. 2S is no more forgiving than 3S about how it is charged. It needs the same balance charger and the same fire-safe bag — see our chargers.

It is the one that fits when nothing else does. If you have measured a battery space and come up short on every 3S option, this is usually the answer. Tell us the dimensions and we will say whether it goes in.

Frequently asked questions

Will my gun run on 7.4v?
Almost certainly, since 7.4v is below the 8.4v NiMH most AEGs ship with. The question is whether you want the lower rate of fire that comes with it.

Why would I choose this over an 11.1v pack?
Three reasons: it physically fits where a 3S will not, it is far lighter at 57g, and it asks much less of an older or unmodified gearbox.

Is 2S safer than 3S?
No. The cell chemistry is identical and so are the handling rules. Fewer cells is not a safety feature.

Will it work with a MOSFET?
Yes, and a MOSFET is worth having whatever voltage you run. It protects the trigger contacts, which is the component that suffers first in any AEG.