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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.
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.
Since 2010, after more than 10 years of development, we have become one of the largest lithium battery wholesalers.
We solely focus on high quality, grade A+, batteries.Because it can provide stable quality, truly achieve long life cycle, and have stable production capacity.
We cooperate with many...
Since 2010, after more than 10 years of development, we have become one of the largest lithium battery wholesalers.
We solely focus on high quality, grade A+, batteries.Because it can provide stable quality, truly achieve long life cycle, and have stable production capacity.
We cooperate with many...
