LiitoKala Lii-34BPCB 18650 3400mAh Battery

LiitoKala Lii-34B-PCB 18650 3400mAh Protected is a 18650-size lithium-ion battery with high nominal capacity and a built-in protection circuit board (PCB) on the negative terminal. The battery features a button-top positive terminal, making it easier to use in flashlights and other portable devices.

This battery is based on a Panasonic NCR18650B 3400mAh cell, manufactured in Japan, which LiitoKala equips with a protection board and casing made in China. The nominal voltage is 3.7 V, full charge voltage is 4.2 V, and full discharge voltage is 2.8 V. Real capacity and characteristics have been instrumentally verified: according to measurements on a LiitoKala Lii-500 charger in NOR TEST mode at 1A current, the average measured capacity is within 3200-3300 mAh. Another block of specifications indicates a real capacity from tests of 3350-3450 mAh when discharged to 3 V, so it should be noted that results may vary depending on the measurement methodology.

The PCB provides protection against overcharge, over-discharge, and short circuit. This is especially important when used in flashlights, where the battery can accidentally discharge below a safe level: the protection board disconnects the cell when the minimum voltage is reached and prevents it from discharging to zero, and also protects against short circuits in case of moisture ingress or terminal contact.

At the same time, it is worth remembering that the protection board is powered by the battery itself; prolonged exposure of a discharged battery under load with the board operating can lead to deep discharge. To avoid this, it is recommended to turn off the device after the batteries are fully discharged.

Application

18650 batteries with PCB are most suitable for flashlights where protection against full discharge is required, as well as for portable electronics: remote controls, gaming consoles, metal detectors, radio-controlled equipment, video cameras, and other devices that require reliable power supply and safe operation.

Technical Specifications

• Manufacturer: LiitoKala, Made in China
• Cell: Panasonic NCR18650B 3400mAh, Made in Japan
• Nominal capacity: 3400mAh
• Minimum capacity: 3250mAh
• Real capacity from tests: 3200-3300 mAh (measured by Lii-500, NOR TEST mode) and 3350-3450 mAh (according to other tests, when discharged to 3 V)
• PCB protection: against overcharge, over-discharge, short circuit
• Button-top positive terminal
• Maximum continuous discharge current: 8 A
• Maximum charge current: 2 A
• Nominal voltage: 3.7 V
• Full charge voltage: 4.2 V
• Full discharge voltage: 2.8 V
• Dimensions: length – 69.5 mm (the text also states that the length is about 70 mm due to the presence of the protection board), diameter – 18.6 mm
• Weight: 48 g

Please note: a protected battery is usually slightly longer and thicker than cells without PCB — this is important to consider when choosing a battery compartment or module in a device. Also, excessive load and increased voltage should be avoided, as this can reduce the battery capacity by 10-15%.

LiitoKala Lii-34BPCB 18650 3400mAh is a reliable choice for those who need high capacity combined with protection and safe use. The battery combines a high-quality Japanese Panasonic cell and protective solutions from LiitoKala, making it suitable for a wide range of portable devices.

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