Nickel Metal Hydride (NiMH) batteries are your best when it comes to a durable battery that's going to last. Less sensitive than a Lipo battery and not susceptible to battery life memory loss like Nickel Cadmium battery packs; NiMH batteries offer the best of both worlds. Great for entry to mid-level players who just want to enjoy the game without having to worry about their batteries. The 8.4V NiMH nunchuk battery is the ideal choice when battery storage space inside your AEG is particularly limited. The trigger response won't be as quick as our higher voltage 9.6V NiMH option, but it's still going to get the job done well and allow you to remain competitive on the field. If you've got an indoor CQB AEG tuned to 350 fps or lower, the Elite Force 8.4V NiMH nunchuk battery is optimal for those rifles with limited space without having to sacrifice much in the way of trigger response. Heavy on the trigger? Do you like to send a lot of rounds down range? Better grab an extra battery pack to stay in the game!