If you have questions after reading the entire page, please email us directly at Your safety is my highest concern!
LiPo (Lithium Polymer/Ion) Battery safety
LiPo batteries can be EXTREMELY dangerous if handled incorrectly! LiPo batteries are very safe for nerf, assuming the guidelines on this page are followed. If you are new to using LiPos, thoroughly read this page three times (we are not joking). You MUST read the manuals for both your battery and charger along with this page.

Shipping charge:
All of the batteries sold on the shop are shipped at 30% charge for safety and should never be used out of the box until properly charged. Doing so will immediately void any warranty and will destroy the battery.
Do NOT physically damage packs:
LiPo batteries are hazardous to drop, cut, burn or otherwise destroy. Handle the battery with care!
Do NOT over-drain or over-use:
If a battery is drained/discharged below 3.0 volts. It may not take a charge again and will be useless. Voltage alarms are the easiest way to protect yourself with LiPo batteries. These give a very loud buzzing noise when any one cell drops below 3.3 volts, allowing you to charge the battery properly.
Use a LiPo alarm when in use:
A LiPo alarm is a necessity when you are actively using a LiPo Battery. Do NOT leave the alarm plugged into the battery when you are storing the battery, as it will slowly drain the battery over time and may kill your pack. Always remove the battery from the blaster when not in use.
Do NOT overdraw a LiPo battery:
LiPo batteries have C-ratings (Current rating). This number is multiplied by the amp hours (size) of the pack. This is independent of cell count (2s, 3s, and 4s).
1500mAh = 1.5Ah (m = mili- = thousandth)
40c x 1.5Ah = 60A max current
Charge in a proper fireproof container or fire-safe environment:
LiPo batteries should always be charged in a LiPo safety bag or other fireproof container. Charging should never be left unattended, and charging containers should be breathable (i.e. no completely airtight containers).
Do NOT short out the battery:
LiPo batteries can provide extremely high current. Never let the positive and negative leads touch.
Balance charging:
Batteries should only be charged on a balance charger, which charges each cell to a specific voltage. All chargers I sell are balance chargers.
All LiPo batteries should be disposed of properly and may NOT be simply thrown away in the trash unless prepared first. Contact your trash service for information on how and where to dispose of batteries locally. 
Puffy or damaged battery: 
You should never use a puffed-up battery pack. This typically happens from overcharging, physical damage, or pulling too much current from a battery. 
Storage temperature:
Store LiPo batteries at room temperature. DO NOT leave batteries in hot cars or near any potential heat source. 
Flying on airplanes with a LiPo battery:
Bring LiPo batteries as carry-on only at storage charge in a LiPo bag. (But DO NOT carry on your nerf blaster, or it will be confiscated or refused). Visit and for more information. We have a blog post all about traveling with Lipo Batteries and nerf blasters.
Alarm use basics:
An alarm should be used anytime a blaster or battery is in use. It should NOT be left plugged in overnight, or it will drain your battery slowly past the point of taking a charge. When an alarm sounds off continuously, discontinue use of that battery immediately. It's not uncommon to hear a short beep when pulling your rev trigger. This is due to a sag in voltage at motor startup. Watch this video for more info.
Cell count:
LiPo batteries in nerf are generally 2s or 3s. "s" refers to the number of cells. A fully charged LiPo cell is 4.2 volts, so a 2s pack is 8.4v, a 3s pack is 12.6, etc. This rating is the fully charged maximum voltage. Always match your battery to your motors.