The Tenergy TN299 Lithium Battery Charger is a versatile, multi-chemistry charger designed for LiFePO4, Li-ion, and LiMn batteries. It features adjustable current, reverse polarity protection, and LCD monitoring, making it ideal for hobbyists and professionals. Its safety mechanisms, compatibility with 2-6S batteries, and rapid charging capabilities ensure reliable performance for drones, RC vehicles, and solar storage systems.
How to Test Continuity with a Multimeter
How Does the TN299 Ensure Safe Charging?
The charger uses reverse polarity detection, temperature sensors, and automatic shutoff to prevent overcharging. Its balancing ports equalize cell voltages, reducing fire risks. The aluminum casing dissipates heat, while error codes alert users to issues like incorrect voltage or faulty connections.
Advanced thermal management is a standout feature. The TN299 monitors internal temperatures every 30 seconds, adjusting fan speed to maintain optimal operating conditions between 32°F and 104°F. This prevents overheating during prolonged charging sessions. The reverse polarity protection uses a dual-circuit design that physically blocks current flow if incorrect connections are detected, unlike cheaper chargers that rely solely on software alerts.
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| Safety Feature | TN299 Implementation | Typical Chargers |
|---|---|---|
| Overcharge Protection | ±0.05V voltage cutoff | ±0.1V tolerance |
| Balancing Speed | 200mA per cell | 50-100mA |
How Long Does the TN299 Take to Charge a Battery?
Charging time depends on battery capacity and current. A 5000mAh LiPo battery at 5A charges in ~1 hour. Smaller 1500mAh packs at 1.5A take ~45 minutes. Use lower currents (1A–2A) for longevity or higher (3A–5A) for speed, ensuring compatibility with battery specs.
The charger’s adaptive charging algorithm reduces time by 15% compared to linear charging methods. For a 6S 22.2V 5000mAh LiPo pack, the TN299 completes a full charge in 68 minutes at 5A versus 80 minutes on basic chargers. However, using maximum current regularly may decrease battery lifespan by 20-30 cycles. The table below shows optimized charging configurations:
| Battery Capacity | Recommended Current | Average Time |
|---|---|---|
| 1500mAh | 1.5A | 45 mins |
| 3000mAh | 3A | 55 mins |
| 5000mAh | 5A | 68 mins |
FAQ
- Can the TN299 Charge NiMH Batteries?
- No. It’s designed exclusively for lithium chemistries (LiFePO4, Li-ion, LiMn). Use a NiMH-specific charger like the Tenergy TN456 for non-lithium batteries.
- Does the TN299 Include a Power Adapter?
- No. Users must supply a 12V DC source (e.g., car battery or compatible AC/DC adapter). A 5A adapter is recommended for maximum output.
- Is the TN299 Suitable for Solar Applications?
- Yes. Pair it with a 12V solar panel regulator to charge LiFePO4 storage batteries. Ensure input voltage stays within 11V–14V to avoid shutdowns.