The LiitoKala Lii-CH4 charger is a compact, intelligent, and highly adaptable charging solution developed to meet the demands of users who work with a wide range of cylindrical rechargeable batteries. With four independently managed charging slots and a user-friendly microcomputer management system, this charger delivers safe, efficient, and flexible performance. It operates via a standard USB 5.0V 2.0A Type-C input, making it easily compatible with common power sources including portable chargers, USB adapters, and power banks, making it an excellent choice for both home and travel use. One of the standout features of the Lii-CH4 is its support for 1.5V lithium-ion batteries that operate on a 4.2V to 1.5V conversion principle. This capability is particularly significant because 1.5V lithium-ion batteries are increasingly used as replacements for disposable alkalines in household electronics, combining the stable voltage of alkaline cells with the rechargeability of lithium chemistry.

The charger automatically identifies standard 3.7V lithium-ion cells, 1.2V nickel-metal hydride and nickel-cadmium cells, and 1.5V lithium-ion batteries, allowing for a seamless plug-and-play experience for most users. For more specialized chemistries, such as 3.2V lithium iron phosphate (LiFePO4) and 3.8V high-voltage lithium-ion (IMR), users can manually select the appropriate battery type using the dedicated buttons located above each slot. The system provides two charging current options, 500mA and 1000mA, giving users the ability to optimize charging times depending on the capacity and condition of the battery. For standard lithium-ion, NiMH, and NiCd batteries, the current can be toggled by pressing and holding the corresponding slot’s button shortly after battery insertion. However, for 1.5V lithium-ion cells, the charger automatically defaults to a 500mA charge rate, which cannot be altered, ensuring optimal safety for this specific battery type.

Each charging slot functions independently, meaning different battery types and sizes can be charged simultaneously without interference. The charger supports a broad range of battery formats, including popular lithium-ion types such as 26650, 21700, 20700, 18650, 18490, 18350, 17670, 17500, 16340 (RCR123), 14500, and 10440. It is also compatible with standard NiMH/NiCd sizes including AA, AAA, SC, and C, covering most cylindrical rechargeable batteries in consumer and professional use. The device uses a constant current and constant voltage charging algorithm, terminating the charge process when the current drops below 100mA to prevent overcharging. This cut-off strategy not only ensures a full charge but also helps extend the lifespan of the batteries.

Safety is a key priority in the design of the Lii-CH4. The charger incorporates multiple protection features including safeguards against overcharging, over-discharging, short circuits, and reverse polarity. These protective systems work in tandem with automatic battery identification to prevent the charging of faulty or incompatible cells, thereby reducing the risk of accidents and ensuring peace of mind during use. A 0V activation function is also built into the system, allowing the charger to revive deeply discharged lithium-ion cells. While it cannot fully charge batteries with a voltage between 1.65V and 2.20V, it initiates a gentle trickle charge to raise the cell’s voltage gradually to a usable level, which can help rescue batteries that would otherwise be considered unusable.

The charger features a simple yet effective interface that provides clear status indicators and easy manual control. Once connected to power, users have a five-second window after inserting a battery to press the Mode button for chemistry selection or the Current button to choose the desired charge rate. The absence of a detailed LCD display makes the Lii-CH4 particularly energy-efficient, with a standby current draw of less than 50mA, and also reduces complexity for users who prefer a straightforward and intuitive charging process. While it lacks real-time visual feedback like voltage or percentage indicators, the LED status lights effectively communicate the charging progress and completion.

Overall, the LiitoKala Lii-CH4 stands out for its unique ability to charge 1.5V lithium-ion batteries, wide chemistry compatibility, robust safety mechanisms, and portable USB-powered operation. It is ideal for users looking for a reliable and simple-to-use charger that does not compromise on safety or versatility. Whether you're a professional working with multiple battery types or a general consumer looking to maintain rechargeable cells for daily devices, the Lii-CH4 offers an intelligent, flexible, and dependable charging experience in a compact and travel-ready form.

Specifications :
Brand:LiitoKala
Model:Lii-CH4
Parameters:
1) Input power supply: USB 5.0V 2.0A（Type-C）
2) Output voltage:
DC 4.20V for Li-ion
DC 4.35V for IMR
DC 3.65V for LiFePO4
DC 1.48V for NiMH/Ni-cd
3) Output current:
Li-ion/IMR/LiFePO4：（1000mA*2）（ 500mA*4）
NiMH/Nicd:（1000mA*2）（500mA*4）
4) Constant current/constant voltage, cut off 100mA;
5) Standbycurrent:<50mA;
6) Compatible battery types and models
Li-ion / IMR/LiFePO4: 26650，21700，20700, 18650, 18490, 18350, 17670, 17500, 16340(RCR123), 14500, 10440
NiMH/Cd: AA, AAA，SC, C

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.