[PC Peripherals] - [USB Products] - [USB Products]

UltraFire WF-137 Charger | charging a 18650/17670 Lithium Battery

UltraFire WF-137 Charger | charging a 18650/17670 Lithium Battery
  • UltraFire WF-137 Charger | charging a 18650/17670 Lithium Battery
Product code: 17536200001
Unit price: 64 CNY  (9.32 USD)
Price unit: Per piece
Minimum order:
Other info: 15KG
Visit my shop

Item specifics

Compatible Battery Type (s) : 18650
Brand: UltraFire
Model: WF-137
Number of Batteries Included: None


  • This a UltraFire WF-137 single switching charger which fit for 1pcs 18650 or 17670 Li-ion battery
  • The battery charger is made of high quality and durable material
  • The battery charger is ideal for charging batteries while traveling, touring
  • Ultrafire WF-137 1battery charger allows you to charge your battery at home or in the moving car
  • The energy density of 18650 li-ion battery charger is higher than any other types of rechargeable batteries
  • The desktop lithium ion battery charger is a convenient way to charge your battery in your home or office
  • Input Voltage: 100-140V (AC)
  • Output Voltage: 4.2V
  • Material: ABS
  • Size: 12.5 x 4 x 3cm / 4.9 x 1.6 x 1.2 (L x W x H)

4 Tips to Extend Your Lithium Battery Life:

  • Battery Memory - When I first got my new cellphone, my friend recommended to fully drain the battery before recharging it. His reasoning was connected to the idea of battery memory. Allowing the battery to fully discharge then recharging to max, supposedly gives you the complete battery capacity. Otherwise, if you simply charged from the half way point to max battery capacity, the battery would treat the half way point as the empty point, thus cutting your battery capacity in half
  • Battery Calibration - There are some benefits to fully discharging your lithium battery periodically, for laptops this can be especially important. If you start to notice your battery meter becoming more and more inaccurate, it may be time for some battery calibration. Allow your lithium battery completely drain, then charge until the battery is full again. This will calibrate your battery giving you more accurate readings
  • Consequences of Heat - Another enemy of lithium battery life is heat. If you were to leave your laptop plugged in and running for a year, you should expect the lithium battery capacity to be anywhere between 60% to 80% of it's original max capacity. This is why people that use their laptops as desktop replacements will notice greatly reduced battery life performance after one year of use. This issue can be resolved by removing the battery while using a corded power source
  • Battery Storage - If you don't plan on using your lithium battery for prolonged periods of time, then you'll want to reduce the charge level to 40% and place the battery in the fridge (not freezer) . Storing the battery at 100% charge level applies unnecessary stress and can cause internal corrosion. On the other hand, if the charge is too low, the battery can become permanently unusable, due to battery self discharge

Package Included:

  • 1 x UltraFire WF-137 Single Switching Charger