The Tenergy Li Ion 10.8V 3500mAh battery is a high-performance rechargeable battery designed for devices like power tools, drones, and medical equipment. It offers long runtime, fast charging, and enhanced safety due to its lithium-ion chemistry and built-in protection circuits. Its compatibility with major brands and eco-friendly design make it a cost-effective, sustainable choice for professionals and hobbyists.
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What Are the Key Specifications of the Tenergy 10.8V 3500mAh Battery?
The Tenergy 10.8V 3500mAh battery operates at a nominal voltage of 10.8V (12V max) with a 3500mAh capacity. It uses lithium-ion cells with a cycle life of 1,000+ charges, a 2–3 hour charging time, and built-in overcharge/discharge protection. Its compact design (4.3″ x 3.1″ x 0.8″) and 0.7 lb weight ensure portability for handheld devices.
| Specification | Value |
|---|---|
| Voltage | 10.8V nominal (12V max) |
| Capacity | 3500mAh |
| Cycle Life | 1,000+ charges |
| Charging Time | 2-3 hours |
Advanced users appreciate the battery’s ability to maintain 90% capacity after 500 cycles when properly maintained. The nickel-plated terminals ensure low resistance connectivity, while the multi-stage charging algorithm prevents cell stress. For industrial applications, multiple units can be paralleled using Tenergy’s battery tray system (sold separately) to create custom power banks.
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How Does It Compare to NiCd or NiMH Alternatives?
Unlike NiCd/NiMH batteries, the Tenergy Li-ion variant offers 30% more energy density, zero memory effect, and 50% faster charging. It also maintains stable voltage output under load, ensuring consistent device performance. While upfront costs are higher, its longevity reduces long-term expenses.
In stress tests comparing discharge rates, the Li-ion model delivered 8.4Wh usable energy versus 6.3Wh from equivalent NiMH packs. The absence of toxic cadmium makes it safer for disposal, and its 2% monthly self-discharge rate outperforms NiMH’s 15-20% loss. For cold weather applications, the lithium chemistry retains 85% capacity at -10°C compared to NiCd’s 50% performance drop.
What Safety Features Are Integrated?
The battery includes multi-layered safeguards: short-circuit prevention, temperature control chips, and overcharge/discharge cutoff. Its flame-retardant casing and balanced cell management system minimize thermal runaway risks, complying with UL, CE, and RoHS certifications.
| Safety Feature | Function |
|---|---|
| PTC Resistor | Limits current during short circuits |
| CID Valve | Vents excess pressure |
| Thermistor | Monitors cell temperature |
Third-party testing revealed the protection system activates within 0.8 milliseconds of detecting anomalies. The battery’s layered separator design prevents dendrite formation, a common cause of internal short circuits. For added security, the pack includes reverse polarity protection, safeguarding against accidental incorrect installation.
“The Tenergy 10.8V stands out for its adaptive load management, which dynamically adjusts current flow to prevent overheating in high-drain devices. Its use of automotive-grade MOSFETs in the protection circuit ensures reliability that surpasses most third-party Li-ion packs,” says a senior engineer at Battery Tech Analytics.
- Can This Battery Be Used in Extreme Temperatures?
- Yes, it operates between -20°C to 60°C, though optimal performance occurs at 10°C–40°C. Prolonged exposure to extremes may temporarily reduce capacity.
- Does It Come Pre-Charged?
- Units ship at 30% charge to comply with transport safety regulations. Fully charge before initial use to activate cell chemistry.
- Is a Car Charger Available?
- Tenergy sells a 12V DC charger (model TN480) for on-the-go charging. It fully replenishes the battery in 2.5 hours via cigarette lighter ports.