Shenzhen RYDBATT Electronics Co., Ltd. is one of the leading manufacturers and suppliers of 21.6v 5.1ah 6s2p lithium battery pack – rydbatt new energy in China. Welcome to buy CE approved batteries in stock here and get free sample from our factory. All customized products are with high quality and low price.
Key Specifications
| Cell Type | 18650 – 3.6V / 2600mAh (grade-A high-energy-density Li-ion cells) |
| Configuration | 6S2P |
| Nominal Voltage | 21.6 V |
| Cycle Life (0.2C, 80% retention) | ≥ 300 cycles |
| Weight | 0.6 kg |
| Dimensions (L×W×H) | 140 × 39 × 67 mm |
Intelligent Protection Circuit Module (PCM)
The built-in PCM (model F5/30A) provides comprehensive safety features
This intelligent BMS ensures safe operation under extreme conditions and extends the battery's service life.
- Over-charge – detection 4.25±0.03V, release 4.15±0.05V, delay 1.0±0.5s
- Over-discharge – detection 2.80±0.05V, release 3.00±0.05V, delay 1.0±0.5s
- Charge over-current – protection 6±2.0A, delay 500±200ms
- Discharge over-current – level 1: 16±2.0A (delay 100±50ms); level 2: 30±8A (delay 10±5ms)
- Short-circuit – trigger >70A, delay 400±50µs, release by removing short
- Temperature protection – charge high-temp 50±5°C (recovery 45±5°C); discharge high-temp 70±5°C (recovery 60±5°C); charge low-temp 0±5°C (recovery 5±5°C); discharge low-temp –20±5°C (recovery –15±5°C)
- Cell balancing – opening voltage 4.125±0.050V, current 30-50mA (built-in CW1274 with time-sharing equalisation)
- Low power consumption – normal mode ≤50µA, sleep mode ≤5µA±3µA
Frequently Asked Questions (FAQ)
Q: Q1: What is the maximum continuous discharge current?
A: A1: The maximum continuous working current is rated at ≤5A. The PCM provides two‑level over‑current protection (16A and 30A) to safeguard your equipment.
Q: Q2: How many charge‑discharge cycles can I expect?
A: A2: Under standard 0.2C charge/discharge, the battery retains over 80% capacity after 300 cycles, providing long‑term reliability.
Q: Q3: What are the physical dimensions and weight?
A: A3: The pack measures 139±1.0 × 38.3±0.5 × 65.5±1.5 mm and weighs approximately 635 grams – compact and lightweight for portable devices.
Q: Q4: What safety certifications does this battery hold?
A: A4: It complies with UN38.3 (transport) and UL standards, verified through our in‑house ISO‑certified laboratories.
Q: Q5: Can I use this battery in cold environments?
A: A5: Yes. Discharge is supported from –15°C to +60°C, with low‑temperature protection activating at –20°C to prevent damage.
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