The Niwalker NB35R is a high-capacity 18650 rechargeable lithium-ion battery designed for reliable power and extended runtime. Featuring a typical capacity of 3450mAh, a 3.6V nominal voltage, and a maximum discharge current of 10A, it is suitable for compatible flashlights and medium-power electronic applications.

With a low internal resistance of 35mΩ or less, the NB35R delivers stable power performance for everyday use and demanding applications.

Key Features

• High Capacity: 3450mAh typical capacity and 3350mAh minimum rated capacity for extended runtime.

• Maximum Discharge Current: Supports discharge currents up to 10A.

• Low Internal Resistance: ≤35mΩ, helping provide stable electrical performance.

• Rechargeable Li-ion Chemistry: Designed for repeated charging cycles.

• Standard 18650 Format: Compatible with devices specifically designed for 18650 Li-ion batteries.

Specifications

Charging & Operating Conditions

• Recommended charging method: Constant Current / Constant Voltage (CC/CV).

• Charging temperature: 0°C to 60°C.

• Discharging temperature: -40°C to 60°C.

• Recommended charging current: 1.7A or less.

• Avoid discharging below 2.5V.

Important Safety Notice

• Use only with devices specifically designed for 18650 Li-ion batteries.

• Use a compatible lithium-ion battery charger.

• Never exceed the specified charging voltage or discharge current.

• Do not short-circuit, puncture, crush, disassemble, or expose the battery to fire or excessive heat.

• Do not mix different battery types or manufacturers in the same battery pack.

• Always follow the battery manufacturer's handling and safety instructions.

Note: The 10A specification is the maximum discharge current stated in the manufacturer's cell specification. A separate pulse discharge rating is not provided.

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

Note:
When you place an order for just the batteries, for easy shipping, faster and safe delivery, the batteries are placed in the flashlights.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Learn more,Please click on Here.

To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

Learn more,Please click here.