The Tenergy NiMH 7.2V 3800mAh Tamiya Battery Pack is a high-capacity rechargeable battery designed for RC vehicles, particularly Tamiya models. It offers extended runtime, compatibility with Tamiya connectors, and a durable build. With low self-discharge and a stable voltage curve, it balances performance and longevity, making it ideal for hobbyists seeking reliability and power.
How to Prevent Lithium-Ion Battery Fires and Explosions
How Does the Voltage and Capacity Affect RC Vehicle Performance?
The 7.2V voltage provides optimal power for Tamiya motors, ensuring consistent speed and torque. The 3800mAh capacity extends runtime by up to 30% compared to standard 3000mAh packs, allowing longer racing sessions. Higher capacity reduces the frequency of recharges, which is critical during competitions or extended play.
Voltage directly impacts motor efficiency and heat generation. A 7.2V system maintains stable RPM under load, preventing voltage sag that can occur in lower-capacity batteries. The 3800mAh rating ensures sustained energy delivery, which is especially beneficial for high-drain applications like rock crawling or drag racing. For perspective, a 3800mAh pack can power a 15-turn modified motor for approximately 25 minutes of continuous use versus 18 minutes with a 3000mAh battery.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
|---|---|---|
|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
|
UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
|
Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
|
Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
|
Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
| Capacity | Runtime (15T Motor) | Recharge Cycles |
|---|---|---|
| 3000mAh | 18-20 mins | 400 |
| 3800mAh | 25-28 mins | 500+ |
What Charging Practices Maximize Battery Lifespan?
Use a smart NiMH charger with peak detection to avoid overcharging. Charge at 0.5C (1.9A) for optimal results. Store the battery at 40-60% charge in a cool, dry place. Avoid draining it below 0.9V per cell (5.4V total) to prevent capacity loss. Periodic discharge-recharge cycles help maintain health.
Temperature monitoring during charging is crucial. Chargers with thermal sensors adjust current flow if the battery exceeds 45°C (113°F), preventing electrolyte breakdown. For long-term storage, discharge the pack to 3.9V before shelving. A maintenance charge every 60 days counters self-discharge without over-stressing cells. Users should also avoid mixing old and new batteries in series configurations, as uneven aging accelerates degradation.
| Charge Rate | Time to Full | Recommended Use |
|---|---|---|
| 0.5C (1.9A) | 2.5 hours | Daily charging |
| 1C (3.8A) | 1.2 hours | Emergency use only |
Expert Views
“The Tenergy 3800mAh NiMH strikes a rare balance between affordability and endurance,” says an RC industry engineer. “Its low internal resistance ensures stable current under load, which is crucial for competitive racing. While not the lightest option, its rugged construction minimizes damage from shocks—a common issue in off-road models.”
FAQs
- How long does it take to charge this battery?
- At 1.9A (0.5C), charging takes approximately 2.5 hours from full discharge. A 4A fast charger reduces this to 1 hour but may shorten overall lifespan.
- Does it work with aftermarket Tamiya upgrades?
- Yes, it’s compatible with upgraded motors and ESCs as long as they’re rated for 7.2V. For high-torque setups, monitor battery temperature during use.
- What’s the average lifespan in charge cycles?
- Properly maintained, this NiMH pack lasts 500+ cycles. Capacity drops to 80% after 300 cycles. Avoid deep discharges to prolong usability.