This 4 Bay charger has 75 mm slot,it can support Battery less than 75 mm
Such as 32750 32700 32650 26700 26500 22750 22700 21750 21700 20700 18650 battery with PCB Protection Board

This charger can test cylindrical battery Discharge Capacity.
On the 4th Charge Slot, you can charge nearly all the 3.6V/3.7V Li-ion rechargeable battery,
such as 32700/32650/26700/26500/22750/22700/21750/ 21700/20700/18650

How to Use
Capacity test setup (4th channel only):
Press "SLOT" and "MODE" simultaneously for 2 seconds，3 small indication lights in Upper right corner Flashes,
and automatically enters the battery capacity analysis mode after 5 seconds.
In this mode, first charge the battery, then discharge it at a constant current of 500mA, calculate the battery capacity in real time and save the capacity data.
After the discharge, charge the battery again and stop. At this time, the recorded capacity mAh is the discharge capacity.

Discharging Setting(4th channel only):
Press "SLOT" and "MODE" simultaneously for 2 seconds,3 small indication lights in Upper right corner Flash,
briefly press "MODE" once, and conduct separate discharge test

FUGASUN 4 Bay 26650 21700 18650 PD FAST Charger With Capacity Test

Compatible With:
1.2V Ni-MH/Ni-CD Battery：AA/AAA/AAAA/C/SC/F6
3.6V/3.7V Li-ion/IMR/INR/ICR （≤75 mm）Battery ：
32700 32650 26700 26500 22750 22700 21750 21700 20700 18650 （≤75 mm）
14650/RCR123 16340/16650/17500/17650/17670/18350/18490/18500/

Specification: 
Input:Type-C DC5V 3A/9V 2.2A;
Charging cut-off voltage:4.20±0.05V/4.35±0.05V/3.60V±0.05V/1.48V±0.1V
Charging Current:0.5A×4;1A×4;2A×2
For Ni-MH Battery:0.5A
Dimensions:153x123x38 mm

Package Includes: 
1 * 4 Bay USB Charger
1 * Type-C PD Charge Cable
1 * Type-C Charge Cable
1 * User Manual
1 * Packing Bag