Safety Instructions

Lithium Polymer Batteries
Thank you for purchasing E-flite Li-Po batteries featuring the proven technology of ThunderPower cells with Charge Protection Circuitry, which
safely monitors the status of each cell to ensure a safe charging process. ThunderPower’s match cell technology assures the consistency in
performance of our E-flite batteries.
E-flite Li-Po batteries have two separate leads. The shorter lead with the WHITE (JST) connector attached is for charging only. It is the
only lead protected by Charge Protection Circuitry, helping prevent costly charging errors. It is very important to note that the circuit only
protects during the charge process. The second longer lead is for discharging or the power source for your airplane. The longer lead may
also be supplier with a JST connector or you may need to solder a connector onto the 16-gauge wire before use.
WARNING: Please read before charging or using battery
IMPORTANT SAFETY INSTRUCTIONS AND WARNINGS
• You must read these safety instructions and warnings before using or charging your batteries.
• Lithium Polymer batteries are volatile. Failure to read and follow the below instructions may result in fire, personal injury and damage to
property if charged or used improperly.
• Neither Horizon Hobby, Thunder Power, or our retailers assume any liability for failures to comply with these warnings and safety guidelines.
• By purchasing this battery, the buyer assumes all risks associated with lithium batteries. If you do not agree with these
conditions, return the battery immediately before use.
General Guidelines and Warnings
1) Use specific Lithium Polymer charger only. Do not use a NiCd or NiMh charger - Failure to do so may cause a fire, which may
result in personal injury and property damage.
2) Never charge batteries unattended. When charging Li-Po batteries you should always remain in constant observation to monitor
the charging process and react to potential problems that may occur.
3) Some Li-Po chargers on the market may have technical deficiencies that may cause it to charge the Li-Po batteries incorrectly or at
an improper rate. It is your responsibility solely to assure the charger you purchased works properly. Always monitor the charging
process to assure batteries are being charged properly. Failure to do so may result in fire.
4) If at any time you witness a battery starting to balloon or swell up, discontinue charging process immediately. Disconnect
the battery and observe it in a safe place for approximately 15 minutes. Continuing to charge a battery that has begun to swell
will result in fire. Likewise, never use a battery if you find it swollen or ballooned upon purchase.
5) Since delayed chemical reaction can occur, it is best to observe the battery as a safety precaution. Battery observation should occur
in a safe area outside of any building or vehicle and away from any combustible material.
6) Wire lead shorts can cause fire! If you accidentally short the wires, the battery must be placed in a safe area for observation for
approximately 15 minutes. Additionally, if a short occurs and contact is made with metal (such as rings on your hand), severe injuries
may occur due to the conductibility of electric current.
7) A battery can still ignite even after 10 minutes.
8) In the event of a crash, you must remove battery for observation and place in a safe open area away from any combustible material
for approximately 15 minutes.
9) If for any reason you need to cut the terminal wires, it will be necessary to cut each wire separately, ensuring the wires to not touch
each other or a short may occur, potentially causing a fire.
10) To solder a connector: Remove insulating tape of Red wire and solder to positive terminal of a connector, then remove insulating
tape of Black wire and solder to the negative terminal of connector. Be careful not to short the wire lead. If you accidentally cause the
battery to short, place it in a safe open space and observe the battery for approximately 15 minutes. A battery may swell or even
possibly catch fire after a short time.
11) Never store or charge a battery pack inside your car in extreme temperatures, since extreme temperature could cause fire.
Before You Charge
1) Make a visual inspection of the pack. Look for any damaged leads, connectors, broken shrink, swelling of cells, or other irregularities.
Do not use if you find any of the above issues with your pack.
2) Before installing or changing the connector, check the voltage of the pack using a digital voltmeter (not your charger). All new packs
ship at approximately 3.80V per cell.
Example 2S pack should read approximately 7.60V
3S pack should read approximately 11.40V
3) If any damage to the pack or leads is found, or the voltage is significantly less for your pack than specified above, do not attempt to
charge or fly the pack; contact E-flite (Horizon Hobby) or Thunder Power directly as soon as possible.
Charging Process
1) Never charge batteries unattended.
2) Charge in an isolated area, away from other flammable materials on a concrete surface outside of buildings.
3) Let the battery cool down to ambient temperature before charging.
4) Do not charge batteries packs in series. Charge each battery pack individually. Failure to do so may result in incorrect battery
recognition and charging functions. Overcharging may occur and fire may be the result. ***In order to discharge packs in series, the
charged voltage of both packs must be within 0.01V for the same cell count pack***