Board Thread:General Nerf discussion/@comment-35070608-20180816041114/@comment-27306930-20180816134310

Yes, LiPo is different from IMR. LiPo stands for Lithium Polymer. IMR is a class of battery that is commonly lithium-manganese-oxide. They are both 3.7 volt cells, but LiPos produce much more current, have a shorter life, and are more temperamental.

Many IMRs come in a AA size called “14500”. Some are just slightly longer, which is a real pain in the butt. LiPos usually come in a pack, either two in series (2S), or three in series (3S) which produce 7.4 and 11.1 volts respectively, and come with four types of molex connectors. Each type of battery has its own special charger.

Those Coolook batteries are LiFePO (lithium-iron-phosphate) batteries, which are very similar to IMRs. Many people lump these together with IMRs when talking about batteries. They can definitely be used in a RapidStrike. You’ll need four of those AA to C converters on the bottom of that page.

The package says 6.4 volts, but it probably varies between 6.4 and 7.4 volts, which is no problem. You’ll also need that LiFePo charger. Or you could get a really good charger like a NiteCore D2 for a few dollars more that can work with any rechargeable AA cell.

You will see a very slight increase in range and ROF with those Coolook batteries. More so with IMRs, and way more with LiPos. If you want to walk on the wild side, you could run your RapidStrike on three IMRs. That will definitely increase your range and ROF, but your motors won’t last as long. It’s a lot of fun though.