Quick Answer
A radio controlled car battery charger is a device that safely recharges the batteries used in RC cars. Most RC cars run on either NiMH (nickel-metal hydride) or LiPo (lithium polymer) batteries, and each chemistry requires a specific charging method. Using the right charger prevents battery damage, extends battery life, and avoids safety hazards like overheating or fire.
NiMH vs LiPo: Which Battery Does Your RC Car Use?
The type of battery in your RC car determines which charger you need. Check the label on your battery pack.
| Feature | NiMH | LiPo |
|---|---|---|
| Common in | Budget and entry-level RC cars | Performance and racing RC cars |
| Voltage per cell | 1.2V | 3.7V |
| Common pack sizes | 6-cell (7.2V), 7-cell (8.4V) | 2S (7.4V), 3S (11.1V), 4S (14.8V) |
| Memory effect | Yes, needs occasional full discharge | No |
| Weight | Heavier for same capacity | Lighter |
| Charging | Simpler, less risk | Requires balance charging |
| Safety | More forgiving | Can catch fire if overcharged or damaged |
If your RC car came with a simple wall-plug charger, it probably uses NiMH. If it came with a balance charger, it uses LiPo. Many modern chargers handle both chemistries.
What to Look For in an RC Car Battery Charger
Not all chargers are equal. Here are the key specifications to check before buying.
Cell count support. This is the most important spec. A SkyRC B6 AC Neo handles up to 6S LiPo and 15-cell NiMH, covering the vast majority of RC cars.
Charge power (watts). Higher wattage means faster charging. A 50W charger will charge a 2000mAh 2S LiPo in roughly 30 minutes. A 200W charger can do the same battery in about 8 minutes, or charge larger packs quickly. The ISDT 608PD delivers 240W for rapid charging.
AC vs DC input. AC chargers plug directly into a wall socket. DC chargers need an external power supply. Some models like the ISDT K4 offer both, so you can charge at home from the mains or at the track from a car battery.
Channels. A single-channel charger charges one battery at a time. Dual-channel chargers like the Gens Ace iMars D1000 can charge two batteries simultaneously, which saves time at the track if you have multiple packs.
Built-in balance charger. LiPo batteries must be charged with a balancer. This ensures each cell in the pack reaches the same voltage. Almost all modern hobby chargers have built-in balancing. If a charger does not explicitly mention "balance charging", do not use it for LiPo batteries.
How to Charge Your RC Car Battery Safely
LiPo batteries require more care than NiMH, but the rules are straightforward once you know them.
Charge on a fireproof surface. Use a LiPo safety bag or charge on a non-flammable surface. Never charge on carpet or upholstery.
Never leave a charging battery unattended. Stay in the room while charging.
Charge at the correct rate. Most LiPo batteries charge at 1C, meaning you charge at the same current as the capacity. A 2000mAh battery charges at 2A. Some support faster 2C or 3C charging, but check the spec first.
Do not charge a damaged battery. If a LiPo pack is swollen, punctured, or has been in a crash, dispose of it at a battery recycling point.
For NiMH batteries, a good charger detects when the battery is full ("delta peak" detection) and stops automatically. The AC/DC multi-function smart charger handles both NiMH and LiPo.
Charging Connectors
RC car batteries use various connectors. The most common are Deans (T-plug), XT60, and EC5 for LiPo packs, and Tamiya connectors for NiMH packs in entry-level cars. Make sure your charger has the matching lead, or pick up an adapter cable from the battery cables collection.
Charging at the Track vs at Home
If you race at a track with no mains power, you need a charger that runs from a 12V source like a car battery. Most DC chargers accept 11V to 18V input. The SkyRC T1000 Maestro is a dual-channel charger that works from both mains and 12V.
At home, any AC-powered charger works. The Gens Ace iMars Mini is a compact balance charger that plugs straight into the wall.
Common Mistakes
- Using the stock wall charger for LiPo. Basic NiMH chargers cannot balance-charge LiPo batteries and will damage them or create a fire risk.
- Charging at too high a current. More amps does not mean better. Charging a 2000mAh battery at 5A when it is rated for 1C (2A) will degrade the cells.
- Storing LiPo batteries fully charged. Store them at around 3.8V per cell ("storage voltage"). Most chargers have a storage mode for this.
- Skipping the balance lead. Always use the balance connector when charging LiPo. Charging through the main leads only risks cell imbalance and battery failure.
Getting Started
If you are buying your first proper charger, start with a mid-range AC/DC balance charger that supports at least 2S to 4S LiPo and 6 to 8 cell NiMH. This covers most RC cars on the market. Browse the batteries and chargers collection for compatible options, and check the battery accessories for safety bags, adapters, and storage solutions.