Excellent Lithium-ion batteries type 18650 for general use. They are great for modeller applications, such as receiver and transmitter batteries, lower-current propulsion system power source, and other devices designed for 18650 operations.

FOXY Li-Ion BATERRIES' BASIC PROPERTIES
The nominal voltage of FOXY Li-ion batteries is 3.7V. The operating voltage mustn't exceed 4,2 V during charging and mustn't drop below 3.0V when discharging. Exceeding these values will probably irreversibly damage the battery. For this reason, you should use special Li-ion battery charger. Failure to follow the correct charging procedure causes the battery to overheat and get damaged by generated gasses (for example like short-circuit does). In the worst scenarios, a chemical reaction with explosion danger can occur. Although Li-ion batteries are completely safe when operating as designed, do not underestimate their dangers.

FOXY Li-Ion BATTERIES' CHARGING
Always use special Li-Ion charger for charging Li-Ion batteries operating in constant current/constant voltage mode. It has to have an automatic voltage controller ensuring that the voltage of one cell doesn't exceed 4.2V (+1%). Don't charge Li-Ion batteries FOXY with current greater than 1C. For basic operation, we suggest using 0.5–1C.

For charging battery packs, we suggest using a charger equipped with balancer.

We also suggest checking the battery voltage before charging. If the cell voltage is lower than 3.3V, it means that you overload them and over-discharge them while operating.

Unlike NiCd and NiMH batteries, Li-Ion batteries don't need an initial setup. If you plan to charge the packs with 1C, we suggest to not exceed 0.5C during first 3 charging cycles. Li-Ion batteries don't need to be drained before charging. It is safe to charge them at any point.

FOXY Li-Ion BATTERIES OPERATION
Use only devices designed for Li-Ion battery power. Try to avoid over overloading the batteries, if there's a residual charge of 20–25% of nominal capacity (lower than 3.3V/Cell). All Li-Ion cells are sensitive to overload, and it may shorten their service life.

Protect the receiver battery from vibrations and shocks, which occur in RC models, by wrapping it in rubber foam or similar damping material. Fix it in an easy-to-reach place in model, where it is protected from fuel, gasses and other operating fluids or water.

STORING
Store the batteries in the partially-charged state. Cell voltage should be 3.80–3.85V. When the batteries haven't been used for a longer time, check and charge them to storing voltage at least once in 3 months.