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ECOLTO HC04150 5mAh 2.4V Cylindrical LTO Cell 3.9x15mm for Backup
Scope
This specification describes the product and model manufactured by Hefei ECOLTO Energy Co.,Ltd
This specification applies solely to rechargeable ithium-ion capacitor batteries or battery packs produced by our company,which include
lithium-ion batteries and protective components.
Battery Configuration
| No. | Name | Model | Remark |
| 2.1 | One piece of cell | HC04150-5mAh-2.4V | / |
Specification
| 1 | Typical Capacity | 5mAh [-30%,+20%] | 0.5C charge/discharge with defined cut-off voltage |
| 2 | Nominal Voltage | 2.4V | / |
| 3 | Internal Impedance | ≤800mΩ | AC 1KHz after standard charge Temperature:20℃±3℃ Relative humidity:≤85% Product voltage:≥2.4V |
| 4 | Charge cut-off voltage | 2.8V | / |
| 5 | Standard charge current | 5mA | 1C |
| 6 | Max,charge current | 100mA | 20C |
| 7 | Standard dis-charge current | 5mA | 1C |
| 8 | Max,discharge current | 100mA | 20C |
| 9 | Discharge cut-off voltage | 1.8V | / |
|
| Temperature
| 40~+100℃ | Operating Temp.Range |
| -20~+70℃ | Storage Temp.Range |
Battery Drawing

Dimension(mm)
| Dimension
| (mm) |
| ①D | 3.9±0.1 |
| L1 | 15.0±0.5 |
| L2 | 17.5±10 |
| L3 | 14±1.0 |
| ①d | 0.45±0.05 |
| F | 1.6±0.2 |
Marking

Electric Performance
| 1 | Standard Charge | Charge to 2.5V at constant current 0.5C,then constant voltage charge to taper current 0.05C | Constant voltage 2.5V for 2.0hours in all at 25±2℃. |
| 2 | Capacity | Measure the capacity through standard charge model and standard discharge model | 5mAh [-30%,+20%] |
| 3 | Cycle Life | Charge:Standard charge model Discharge:Standard discharge model Repeat the procedures below25000cycles | Residual capacity ≥80%after 25000 cycles vs.Discharge capacity of first cycle |
| 4 | Impedance | Internal resistance measured at 1KHz AC | ≤800mohm |
| 5 | Battery Voltage | Measure OCV by multimeter | 2.2~2.8 V |
| 6 | Temperature Performance of Battery | Charge:Standard charge model Discharge:Discharge to1.8V at 0.2C/1c Constant current at -40℃ and 100℃ respectively | 100℃,Capacity ≥90% |
General Specifications
This cell delivers 5mAh typical capacity with a tolerance of -30% to +20%. Nominal voltage is 2.4V. Internal impedance is ≤800mΩ measured at AC 1kHz after standard charge. Charge cut-off is 2.8V. Discharge cut-off is 1.8V. Standard charge and discharge current is 5mA (1C). Maximum charge and discharge current is 100mA (20C). Operating temperature spans -40°C to +100°C. Storage temperature is -20°C to +70°C.
Physical Characteristics
Diameter ΦD is 3.9±0.1mm. Length L1 is 15.0±0.5mm. Lead length L2 is 17.5±1.0mm and L3 is 14±1.0mm. Lead diameter Φd is 0.45±0.05mm. Lead pitch F is 1.6±0.2mm. The cell uses a cylindrical pin type form factor with tinned copper-clad steel leads.
Cycle Life Data
Under standard 1C charge/discharge at room temperature, the cell retains ≥80% of initial capacity after 25,000 cycles. This exceptional longevity makes it suitable for applications requiring frequent cycling over many years without replacement.
Temperature Characteristics
At 100°C, capacity retention is ≥90% of rated value. At -20°C, the cell maintains ≥60% of rated capacity. High temperature storage at 70°C for 28 days yields retention capacity >50% and recovery capacity >80%. The LTO chemistry enables stable operation across extreme temperature ranges.
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