LR2170 50PT Cylindrical Cell – Product Overview
The LR2170 50PT cylindrical cell is a high‑energy (18.0Wh) and high‑power (70A continuous) 21700‑format battery from Lishen. It bridges the gap between capacity and discharge capability, making it the preferred power source for professional power tools, light electric vehicles, drones, robotics, and industrial equipment. With validated performance across extreme temperatures and aggressive duty cycles, this cell delivers reliability and longevity in the most demanding applications.
Key Selling Points of the LR2170 50PT Cylindrical Cell
-
Balanced energy & power – 5000mAh nominal capacity with 70A max discharge (80°C thermal cutoff)
-
Superior cycle life – 1000 cycles at 10A discharge (≥60% retention); 500 cycles at 40A (≥60%); 300 cycles at 50A (≥50%)
-
Wide temperature range – Discharge from -30°C to +60°C ambient; charge from 0°C to 50°C
-
Fast charge capable – Supports 15A (3.0C) charging with temperature‑compensated current limits
-
Proven safety – Passes short‑circuit, overcharge, over‑discharge, thermal abuse, and crush tests (no fire, no explosion)
Technical Specifications of the LR2170 50PT Cylindrical Cell
| Parameter | Value |
|---|---|
| Nominal Capacity / Energy | 5000mAh / 18.0Wh (min. 4900mAh) |
| Nominal Voltage | 3.60V |
| Charge Voltage (limited) | 4.20V (absolute max 4.25V) |
| Discharge Cut‑off | 2.50V |
| Standard Charge | 2.5A (0.5C) CCCV, 4.20V, 100mA cut‑off |
| Rapid Charge | 10A (2.0C) CCCV |
| Max Continuous Charge | 15A (3.0C) – temperature dependent |
| Max Continuous Discharge | 70A (80°C surface cutoff) |
| Internal Impedance (AC 1kHz) | ≤ 5.0mΩ |
| Weight | ≤ 69g |
| Dimensions | Φ21.2±0.2 mm × 70.5±0.2 mm |
| Shipping SOC | 20% ~ 30% |
Charge current vs. temperature:
0°C–15°C → 2.5A; 15°C–40°C → 15A; 40°C–50°C → 8A
Rate & Cycle Performance for the LR2170 50PT Cylindrical Cell
Discharge rate capability (relative to 10A):
10A (100%), 20A (≥95%), 30A (≥93%), 40A (≥90%), 50A (≥60%)
Cycle life (25°C, 8A charge):
-
10A discharge → 1000 cycles ≥60% retention
-
40A discharge → 500 cycles ≥60% retention
-
50A discharge → 300 cycles ≥50% retention
All high‑rate discharges pause at 80°C surface temperature and resume after cooling to ≤50°C.
Safety & Compliance of the LR2170 50PT Cylindrical Cell
The cell has passed the following tests without fire or explosion:
-
External short circuit (80mΩ ± 20mΩ)
-
Overcharge (10A to 6V)
-
Over‑discharge (1C for 90 min)
-
Thermal abuse (130°C / 30 min)
-
Crush (13kN force)
Compliant with UN38.3, UL1642 (reference), and IEC62133 (reference).
Pack Design Essentials for the LR2170 50PT Cylindrical Cell
-
Protection required: Overcharge ≤4.23V/cell, over‑discharge ≤2.50V, over‑current ≥50A, short‑circuit, over‑temperature (80°C cutoff), cell balancing, and thermal propagation prevention.
-
Thermal management: Cooling system for high‑rate / high‑temp use; cell spacing ≥1mm; pack temperature differential ≤5°C.
-
Connection: Spot welding only – soldering and ultrasonic welding are prohibited.
-
Cell matching for series/parallel: Voltage ≤10mV, IR ≤4mΩ, same grade/batch/SOC.
-
Mechanical: Secure fixing, non‑flammable materials, insulation between PCBA and cells, and protection against dust/liquid ingress.
Storage, Packaging & Warranty
-
Storage (≤65% RH, no corrosive gas):
≤1 month: -20°C~60°C; ≤3 months: -20°C~45°C; ≤12 months: -20°C~25°C;
Long‑term (>3 months): 0°C~25°C, <50% SOC, charge/discharge every 6 months. -
Packaging: 130 cells per box.
-
Warranty: 12 months from shipping, or until 300 cycles (whichever comes first).
Ordering & Support
For samples, bulk orders, or custom pack design consultation, please contact:
📧 Email: info@becellbattery.com
🌐 Website: www.becellbattery.com
Reviews
There are no reviews yet.