Description
50AA 2000mAh NiMH Battery Product Attributes
Key Features:
1. Rechargeable AA Ni-MH cylindrical cell with 1.2V nominal voltage and 2000mAh nominal capacity.
2. Minimum capacity is specified as 2000mAh when discharged at 0.2C to 1.0V.
3. Standard charge condition is 200mA for 16 hours.
4. Rapid charge condition is 1000mA for 140 minutes with -ΔV=5mV/pcs cut-off control.
5. Cell dimensions are 13.8–14.5mm diameter and 49.0–50.5mm height.
6. Internal impedance is specified as not more than 35mΩ after standard charge.
7. Cycle life is specified to exceed 500 charge-discharge cycles according to IEC61951-2:2017 test conditions.
| Type | Description |
|---|---|
| Category | Ni-MH Batteries |
| Mfr | GMCELL |
| Battery Chemistry | Nickel Metal Hydride |
| Battery Type | Cylindrical Sealed Nickel Metal Hydride Battery |
| Model | GMCELL-50AA2000mAh |
| Specification | Ni-MH AA2000mAh 1.2V |
| Battery Configuration | Single AA NiMH cell, 1 × 1.2V |
| Voltage – Rated | 1.2 V |
| Nominal Capacity | 2000mAh |
| Minimum Capacity | 2000mAh at 0.2C discharge to 1.0V |
| Standard Charge | 200mA × 16 hours |
| Rapid Charge | 1000mA × 140 minutes, -ΔV=5mV/pcs |
| Charge Voltage | Less than 1.6V, measured within 5 minutes before standard charge completion |
| Open Circuit Voltage | Greater than 1.25V within 1 hour after standard charge |
| Closed Circuit Voltage | Greater than 1.2V with 0.86Ω load within 1 hour after standard charge |
| Internal Impedance | ≤35mΩ, checked at 1000Hz within 1 hour after standard charge |
| High Drain Discharge | ≥108 minutes at 0.5C discharge to 1.0V within 1 hour after standard charge |
| Self Discharge | Remaining capacity shall be not less than 70% of rated capacity after 28 days storage at 20±3℃ |
| Overcharge Test | After standard charge, charge at 0.1C for 48 hours; no external deformation or electrolyte leakage; capacity shall be equal to or greater than rated capacity |
| Over-discharge Test | After discharge to 1.0V and 24-hour discharge with 0.86Ω load, no external deformation or leakage; subsequent capacity shall be not less than 80% of rated capacity |
| IEC Cycle Life Test | Cycle life shall exceed 500 times according to IEC61951-2:2017 test method |
| Low Temperature Discharge | Discharge duration shall exceed 3 hours 30 minutes at 0℃±2℃ after standard charge and 24-hour storage at 0℃±2℃ |
| Operating Temperature | Standard charge: 0–40℃; rapid charge: +10–35℃; floating charge: -10–40℃; discharge: -20–55℃ |
| Operating Humidity | +65% ±20% |
| Storage Temperature | Within 1 year: -20℃ to 35℃; within 6 months: -20℃ to 45℃; within 1 month: -20℃ to 50℃ |
| Storage Humidity | +65% ±20%; storage environment should be clean, dry, and ventilated |
| Recommended Storage | Store at -20℃ to +35℃, preferably 15℃ to 25℃, with relative humidity not more than 85%; keep away from corrosive substances, fire, and heat sources |
| Storage Charge Guidance | Batch batteries are requested to be stored with 50% electric charge; after storage over 3 months, discharge at 0.2C to 1.0V and then add 50% electricity for storage |
| Dimensions | Diameter 13.8–14.5mm; height 49.0–50.5mm; top diameter 5.4±0.2mm; top height 1.5±0.3mm |
| Weight | Approx. 27.0g |
| Insulation Resistance | Outer sleeve shall exceed 10MΩ |
| Humidity / Leakage Test | After standard charge, store for 14 days at 33±3℃ and 80±5% relative humidity; no liquid electrolyte leakage shall be observed |
| Vibration Resistance | After vibration test with 4mm amplitude, 1000 cycles/minute, 60 minutes in any direction, OCV change shall be less than 0.02V and internal impedance change less than 5mΩ |
| Drop Test | After drop test from 450mm onto hardwood board, OCV change shall be less than 0.02V and internal impedance change less than 5mΩ |
| Short Circuit Test | After standard charge and 1-hour rest, short-circuit for 1 hour with wire section at least 0.75mm²; battery shall not explode, while leakage, deformation, or outer sleeve cracking is permitted |
| Safety Valve Performance – Over-discharge | Discharge at 0.2C to 0V, then increase current to 1C for 60 minutes; safety valve must start normally and battery must not break |
| Safety Valve Performance – Overcharge | Charge at 0.5C for 5 hours; no explosion, while leakage, deformation, and outer package breakage are allowed |
| Transportation | Keep clean, dry, and well ventilated during transportation; prevent vibration, impact, extrusion, sun exposure, and rain |
| Carton Storage Placement | Packed battery cartons should be stacked less than 5 layers, with 5–10cm distance between cartons for air circulation |
| Warranty | Battery guarantee time: 12 months |
| Delivery Charge Note | Delivery charge is stipulated to be less than 50% full power; charge requirements over 50% should be executed after mutual consultation |
| Charging Method | All rapid charge methods should be discussed with GMCELL engineers; use a charger appointed by GMCELL and follow GMCELL charging instructions |
| Safety Notes | Do not throw into fire, heat, collide, throw, solder leads directly to the cell, short-circuit, disassemble, overcharge, or use batteries showing leakage, discoloration, deformation, or other changes |
| Replacement Checkpoints | Confirm AA cell size, 1.2V voltage, 2000mAh capacity requirement, charging condition, discharge condition, polarity, compartment fit, and storage condition before replacement or pack assembly |
| Shipping Info | Available for AA 2000mAh NiMH cell supply or custom rechargeable NiMH battery pack projects using GMCELL-50AA2000mAh cells |
