High Rate, Overcharge and Over-Discharge Tolerance, Drop Safety
None of Them Can Be Left Out
Power tool users do not practice gentle handling. Stall torque, continuous heavy loads, being dropped on the ground, being left out in the rain overnight at a job site. These are what the battery must withstand. QuanVol power tool batteries use INR18650 hybrid solid-liquid cylindrical cells, with maximum continuous discharge of 10C, and still deliver more than 70% of capacity at a 10C rate.
When a Tool Battery Fails
Users Blame the Tool Brand
Power tools are one of the few categories where the battery is treated as a consumable. Users saw, drill and hammer with them, and peak currents far exceed the rated value. Once the battery cannot keep up, rotational speed drops, runtime drops, and eventually so does brand repurchase rate.
INR18650 · Hybrid Solid-Liquid Cylindrical Cell Specifications
Power Tools / Garden Machinery / Power EquipmentCore electrical performance
INR18650 · 18650 Standard Size| Cell Type | Cylindrical lithium-ion cell (hybrid solid-liquid system) |
|---|---|
| Nominal Capacity | 2100mAh @0.2C |
| Minimum Capacity | 2000mAh @0.2C |
| Nominal Voltage | 3.7V |
| Charge End Voltage | 4.20V |
| Discharge End Voltage | 2.5V |
| Standard Charge Current | 0.5C（1000mA） |
| Standard Discharge Current | 0.5C（1000mA） |
| Maximum Charge Current | 1C（2000mA） |
| Maximum Continuous Discharge Current | 10C（20000mA） |
| Internal Resistance | ≤20mΩ（AC 1kHz，25±2℃） |
| Weight | 43±1 g |
| Sleeve Color | Light purple |
Rate Discharge Characteristics
After standard charge, rest 10min, then discharge at each rate to 2.5V| Discharge Rate | 0.2C | 0.5C | 1C | 2C | 10C |
|---|---|---|---|---|---|
| Relative Capacity | 100% | ≥97% | ≥95% | ≥90% | ≥70% |
This table is the one power tool customers should look at first: from 0.2C to 10C, the capacity drop is under 30%. This means runtime under heavy-load conditions will not fall off a cliff.
Operating Temperature and Rate Limits
Temperature versus current limits during charge and discharge| State | Temperature Range | Maximum Allowed Rate |
|---|---|---|
| Charge | 0℃ ≤ T ≤ 10℃ | Max. 0.2C |
| Charge | 10℃ < T ≤ 50℃ | Max. 1C |
| Discharge | -20℃ ≤ T ≤ -10℃ | Max. 0.2C |
| Discharge | -10℃ < T ≤ 0℃ | Max. 0.5C |
| Discharge | T ≥ 0℃ | Max. 10C |
Maximum recommended cell surface temperature during charge and discharge: 0 ~ 50℃ for charging, -30 ~ 60℃ for discharging. For winter job-site work, 0.5C output is still available below -10℃, so the tool will not simply fail to start.
Cycle Life and Storage
Test conditions 25±2℃| Cycle Life | At 25±2℃, constant-current constant-voltage charge at 0.5C to 4.2V (cut-off 0.02C), constant-current discharge at 1C to 2.5V, rest 30min constitutes one cycle; after 800 cycles the remaining capacity is ≥ 80% of the initial capacity |
|---|---|
| Storage Characteristics at 25℃ | After standard charge and open-circuit storage for 30 days: remaining capacity ≥90%, recovered capacity ≥95% |
| High-Temperature Full-Charge Storage at 55℃ | At 100% SOC, stored for 7 days: remaining capacity ≥85%, recovered capacity ≥90% |
| Storage Conditions | 1 month -30~50℃; 3 months -30~45℃; 12 months -30~25℃; relative humidity 0 ~ 75%RH |
The figures above are specifications for the INR18650 model in the QuanVol power tool battery product line. Capacity and rate data for this model are subject to the specification table and must receive final confirmation from the technical team before external publication. Pricing is quoted individually according to model and order quantity and is not disclosed through public channels.
Covering Two High-Rate Application Scenarios
Professional-Grade Power Tools
Drills, angle grinders, impact wrenches, cordless rotary hammers. The current surge at the moment of stall is the hardest test for a cell, and 10C continuous discharge capability provides margin for these conditions.
Garden Machinery
Mowers, hedge trimmers, blowers. Long continuous operating time and a wide ambient temperature span make wide-temperature discharge and 800 cycles the long-term equation for these products.
Need a 10C-Class Tool Battery?
Tell us your tool type, peak current, voltage platform and pack dimensions. QuanVol will provide cell selection, series-parallel configuration and a sample validation schedule.