This review dives deep into the Dyness 12.8V 100Ah LiFePO4 battery, a cost-effective power solution attracting considerable attention. We subjected this battery to rigorous testing, evaluating its capacity, build quality, and overall value proposition. From demanding load tests pushing its limits to a meticulous teardown revealing internal components and construction, we leave no stone unturned in assessing its performance and durability. Our analysis covers not only the advertised features but also unexpected functionalities, offering a comprehensive perspective for potential buyers.This in-depth examination covers everything from the battery’s real-world capacity and the robustness of its Battery Management System (BMS) to a detailed assessment of its internal construction and the quality of its components. We also explore the safety features included, highlighting any pleasant surprises along the way. Ultimately, this review aims to provide a clear and unbiased judgment on whether the Dyness 12.8V 100Ah LiFePO4 battery lives up to its claims and represents a worthwhile investment in the competitive market of lithium iron phosphate batteries.
Pros And Cons
- Delivered 1300 watt-hours of capacity (approximately 101-102 amp-hours).
- Maintained 130 amps for a period of time without issue.
- Uses a high-quality Siang BMS (100 amp).
- Features high-temp and low-temp protection (low-temp protection not advertised).
- Has a robust build with good wire gauge and secure connections.
- Includes a carry strap, M8 terminal bolts, and a user manual with wiring guides.
- Metal corner guards instead of full-length plastic guards; potential for damage with significant movement or mobile applications.
Read more: OUKITEL P2001 PLUS Review: Best Budget Portable Power Station?
Capacity Test Results
The Dyness Group 31 battery underwent a rigorous capacity test. Initially, a 36-amp, 478-watt load was applied. The test continued until the inverter shut down after approximately 1300 watt-hours, translating to roughly 101-102 amp-hours. This surpasses the advertised capacity, indicating excellent performance.
An increased load of roughly 100 watt-hours was briefly added to test the BMS. The battery easily handled a 130-amp draw for this period, showcasing the robustness of the Battery Management System (BMS).
Battery Unboxing and Physical Attributes
The Dyness battery arrived with a user manual and M8 terminal bolts. The manual contains wiring diagrams and specifications for creating 48V or 51.2V packs using multiple batteries.
The battery features a stylish design with a holographic logo and easily accessible specifications printed on the back for quick reference. A carry strap is included for convenient portability.
Internal Build Quality and Components
The teardown revealed a well-constructed battery. The positive lead uses a 6-gauge, 200°C jacketed cable with a hydraulically crimped connection and additional sealant. The negative lead is similarly robust, utilizing five 12-gauge, silicone-jacketed cables. The BMS is a common and reliable model from a reputable manufacturer.
The cell pack shows even cell spacing with tie-band compression. Metal corner guards (instead of the usual plastic or fiber) protect the cell assembly. Laser welds on the cell connectors and bus bars indicate a high-quality manufacturing process.
Thermal Protection and Cell Condition
Testing revealed the presence of both high-temperature and low-temperature protection circuits – a positive surprise, as low-temp protection wasn't advertised. The high-temp protection successfully cut off the current when heat was applied to the NTC thermistor. The low-temp protection also functioned correctly when the sensor was exposed to ice.
After the capacity test, individual cell voltages were checked and found to be consistently at 3.296V, demonstrating the excellent cell balancing of the BMS.
Conclusion and Value
The Dyness 12.8V 100Ah LiFePO4 battery exceeded expectations during testing. The capacity test results were impressive, exceeding the advertised capacity. The build quality is generally good, with robust connections and a reputable BMS. The unexpected inclusion of high and low temperature protection adds to its safety profile.
At a price point of $149.99 at the time of the review, this battery offers strong value for its performance and features. While minor improvements could be made (like using full-length plastic corner guards), the Dyness battery stands out as a compelling option in the market. Its high capacity and reliability make it a worthy consideration for those seeking a cost-effective and high-performing lithium iron phosphate battery.