26650 3600mAh Lithium Ion Battery Cell For Flashlights
26650 3600mAh lithium iron battery cell for high-drain devices/flashlights
About 26650 Lithium Phosphate Battery Cell
- 26650 lithium ion battery uses LiFePO4 as positive electrode, with dimensions 26*65mm high. 26650 cells can be assembled into battery packs or prismatic cells for many applications including solar storage, LED street lamps, energy backup systems, RVs, home energy systems, electric cars, and bicycles.
- Lithium batteries use lithium metal or lithium alloy as positive/negative electrode material with non-aqueous electrolyte solution.
- Lithium batteries are categorized into lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable.
- Deligreen's 26650 batteries offer high quality with real 3600mAh capacity.
- All 26650 batteries we supply are Grade A quality.
Lithium Battery vs Lead Acid Battery Comparison
| Battery Type |
LiFePO4 Battery |
Lead Acid Battery |
| Nominal Voltage |
3.2V |
2V |
| Energy Density |
180Wh/kg |
30Wh/kg |
| Weight |
Light |
Heavy |
| CBM |
Small |
Big |
| Safety Rate |
High |
Low |
| Cycles |
3500 |
500 |
| Memory Effect |
No |
Yes |
| Environmental Protection |
Pollution-free |
Pollution |
More people are choosing lithium batteries to replace lead acid batteries. Lithium batteries offer deeper cycles up to 2000 times, lasting much longer than lead acid batteries. This reduces replacement frequency and saves costs.
26650 Lithium Phosphate LiFePO4 Battery 3600mAh Specifications
| Items |
Specification |
Remarks |
| Nominal Capacity |
3600mAh |
0.2 C5A Discharge |
| Minimum Capacity |
3550mAh |
|
| Nominal Voltage |
3.2V |
Work voltage |
| Discharge Cut-off Voltage |
2.0V |
0.2 C5A Discharge |
| Charge Limited Voltage |
3.65±0.03V |
0℃～45℃ |
| Standard Charge Current |
0.5 C5A |
0℃～45℃ |
| Standard Discharge Current |
0.5 C5A |
-20℃～60℃ |
| Rapid Charge Current |
1C5A |
0℃～45℃ |
| Rapid Discharge Current |
1C5A |
-20℃～60℃ |
| Max. Discharge Current |
3C5A |
Limited Voltage 2.0V |
| Max. Pulse Discharge Current |
5C5A |
ms |
| Internal Impedance |
≤25mΩ |
At AC 1kHz |
| Weight |
About 85.0g |
±2g |
| Storage Temperature Range |
≤1 month: -20℃ ~ 45℃
≤3 months: -20℃ ~ 35℃
≤1 year: -20℃ ~ 25℃ |
Voltage of shipment 3.20V～3.25V |
Quality Testing
Deligreen's 26650 batteries have passed laboratory testing according to specifications. Contact us for testing reports.
Standard Testing Parameters
| Items |
Test Conditions |
Specification |
| Standard Charge |
Charging with constant current 0.2C5 to 3.65V, then constant voltage 3.65V to 0.01C5 under 20±5℃ (charging time ≤8h) |
|
| Nominal Capacity |
Discharge current 0.2C5 to cut-off voltage 2.0V at 20±5℃ after Standard Charge |
≥3600mAh |
| Cycle Life |
After 2000 charge/discharge cycles, measure discharge capacity with 0.2C5A current and 2.0V cut-off voltage |
≥80% Nominal Capacity |
| Storage |
Cells charged to 45% capacity, stored for 3, 6, 12 months at 20±5℃, then cycled 5 times |
0.2C discharge time: After 3 months ≥4.5hrs; After 6 months ≥4.25hrs; After 12 months ≥4.0hrs |
| Capacity Retention |
Cells charged/discharged using 0.2C5 at 20±5℃, stored 28 days after fully charged, then discharged |
C2/C1 ≥ 90% |
| Capacity Recoverable Ratio |
After C2 test, cells charged/discharged using 0.2C5 at 20±5℃ |
C3/C1 ≥ 95% |
Rate Capacity Performance
| Discharge Current |
Performance |
| 0.2 C5A |
≥100% Nominal Capacity |
| 0.5 C5A |
0.5C/0.2C = 95% |
| 1 C5A |
1C/0.2C = 92% |
| 3 C5A |
3C/0.2C = 85% |
Environmental Characteristics
| Items |
Test Conditions |
Specification |
| Temperature Performance |
Cells charged according to standard, discharged at 0.2C5 to 2.0V at various temperatures |
-20℃/25℃ ≥ 40%
-10℃/25℃ ≥ 60%
0℃/25℃ ≥ 85%
25℃/25℃ ≥ 100%
60℃/25℃ ≥ 95%
No leakage, no appearance defects |
| Constant Temperature and Humidity |
Cells charged with 0.2C5, placed in 40±2℃ and 90-95% humidity for 48h, then discharged with 0.2C5 to 2.0V |
No deformation, rust, leakage, fire, smoke, or explosion. Discharge time ≥ 3h |
| Free Fall Test |
Fully charged cell dropped three times from 1000mm height onto concrete floor in random orientations |
No explosion, fire, or smoke. OCV after test no less than 90% before free-fall test |
Deep Cycle Performance
26650 batteries perform exceptionally well in high temperatures. If you need batteries for high-temperature applications, LFP batteries are an excellent option.
Operating temperature range: -20°C to 60°C
Applications
26650 cells are ideal components for battery packs used in various applications. Our battery packs feature IP55 rating, suitable for both indoor and outdoor use.
Contact us with your battery pack requirements for customized battery system solutions.
Transportation & Delivery
Shipping to USA
- Method: By sea + Express (DDP, Tax free)
- ETD: 5-8 days
- ETA: 25-35 days after sailing
- Tracking updates after local express pickup (typically 15-25 days after sailing)
Shipping to EU (Except Switzerland, Romania)
- Method: By railway + Express (DDP, Tax free)
- ETD: 5-8 days
- ETA: 30-45 working days after shipping
- Tracking updates after local express pickup (typically 25-40 working days after shipping)
For remote areas not listed, please provide shipping address and zip code for verification.
About Us
Changsha Deligreen Power Co., LTD, founded in 2010, is a "Green Energy Solution Service Provider" specializing in lithium rechargeable batteries, BMS, balancers, chargers, and related products.
Main applications include electric bicycles, scooters, motorhomes, AGVs, solar/wind systems, energy storage systems, trucks, and more.
Our Promises
- Real lithium capacity as specified
- 100% refund for any quality problems
- 100% replacement for any shipping damage
- Lifetime fast technical support
Customer satisfaction is our endless pursuit. For any concerns, please email the manager: info@deligreenpower.com
Frequently Asked Questions
Q1: What is your MOQ?
A1: Generally, our MOQ is 100 pieces, which may vary by product.
Q2: Are these batteries brand new?
A2: Yes, all batteries we provide are brand new.
Q3: What are 26650 batteries used for?
A3: Laptops, flashlights, electronics, vaping devices.
Q4: I am a distributor. Can I cooperate with the battery warehouse for a long time?
A4: Yes, individual pricing for large-scale projects and wholesale demand is available.
Q5: Where to buy 26650 battery?
A5: Please contact us through the form at the bottom of the page. We will reply promptly.
