There are many product styles, please check the product picture when you buy to buy the required charging set.
2020 New Charger Lii-PD2 Manual
First, the charger specifications and functions:
1. Adopt DC12V1A (nominal) input, two-slot independent charging and microcomputer management system;
2. The biggest highlight of this charger is that it can charge the battery regardless of polarity
3. The charging current has three levels of 0.5A /1.0A/2.0A, the default is 0.5A charging, you can press the corresponding button to select the charging current;
4. During charging, the LCD can display the channel CH and the charging current, voltage, time, capacity and battery type of the channel Li-Fe 3.20V /
Li-ion 3.70V / Li-ion 3.85V (IMR); the charging current of the two tanks does not exceed 2A in total, that is, when one of the tanks is charged with 2A current, and then the battery is charged in the other tank, the front 2A current will drop Charge to 1A current; LCD will display FULL when the battery is full;
5. Li-ion (Li-Ion 3.70V) battery and nickel-metal hydride (Ni-MH) battery can be automatically identified, and the lithium iron phosphate battery (3.20V) and
Li-Ion 3.85V battery;
6. With 0V voltage activation function, 1.65-2.20V can not be charged (but there will be activated current trickle type charging).
7. There are multiple safety protection functions such as overcharge, overdischarge, short circuit, etc. At the same time, it can intelligently and automatically identify bad batteries;
8. Charging mode: constant current and constant voltage.
2. Buttons and display:
1. Button (Mode): Each of the two buttons controls a slot. Within 5 seconds after power-on, put the battery in, click the Mode button of the corresponding slot to select the type of rechargeable battery. Long press the Mode button to select the charging current. Set the type of battery to be recharged (for example, 3.20V / 3.80V) and the charging current, then stop the operation, and enter the charging state after 5 seconds; you cannot switch the battery type during the charging process, but you can click the button to light the backlight Press to switch the current,
2. LCD: After the charger is connected to the power supply, the LCD display will display for about 2 seconds, and then display null. When a battery is detected, the LCD displays the corresponding slot number, battery voltage and current, and the battery type symbol flashes (NiMH / Nickel-cadmium 1.2V (no battery type symbol flashes), after 5 seconds, enter the default recognition to charge the battery, at this time the charging display ''%'' symbol flashing indicates that charging is in progress, and END is displayed when charging is completed;

LiitoKala Lii-PD4 Charger details:

Electrical Parameters:
1. Input : AC cable 110-240V 50/60Hz (included)/ DC 12V 1A（selective）
2. Output voltage: DC 4.2V for Li-Ion 3.7V
DC 4.35V for Li-Ion 3.8V( IMR)
DC 3.65V for LiFePO4
DC 1.48V for NiMH/NI-Cd
3. Output current: Li-Ion/IMR/LiFePO4 2000mA*1(only for slot4),
1000mA*2, 500mA*3 500mA*4
NiMH/NiCd: 1000mA*2, 500mA*3 500mA*4
4. Constant voltage, cut-off current: less than 100mA
5. Standby current: less than 15mA
Compatible battery types and sizes
Li-ion / IMR/LiFePO4: 26650,21700,20700, 18650, 18490, 18350, 17670, 17500, 16340(RCR123), 14500, 10440
NiMH/Cd: AA, AAA,SC, C
Size and weight:
133mm x 100mm x 35mm (L x W x H)
Weight: approx175g (not including AC cable)

Cautions:

This charger can charge all cylindrical rechargeable batteries 3.7V Li-Ion , 3.8V IMR, 1.2V Ni-MH/Cd, 3.2VLiFePO4
Read this manual before use and pay special attention to the recommended charge current, must avoid to charge battery beyond the recommended current limit
If DC input, only 12V 1A is recommended
Mind heating while charging
Remove the charger from power source after charging complete, and remove the battery from the charger at the same time
For indoor use only
The displaying data only for reference, please refer to professional instrument for more accurate data

Button and LCD :

1. Button of Mode(Channel button): there are 4 independent buttons separately for each channel. While power supply is connected and battery inserted, 1) Short click the channel button in 5S to change the battery type. It will start to charge 5 seconds after setting the battery type (3.2V or 3.80V), 1.2V Ni-MH and 3.7V li-ion can be detected automatically, so it needs setting only 3.2V and 3.8V batteries;

Note: Battery type can be only selective before charging starts.

2. LCD: While power supply connected, the LCD will light up for 3S: 1) If no battery is inserted, the LCD will display ''null'' and will be off in 30S 2) When battery is inserted and detected, the LCD will show channel number while the battery type image '' Li-Ion 3.7V''flashing indicating to set the battery type: this moment if short click the channel button, it can set battery type; if no operation in 5 seconds, it begins by automatic detection(Li-Ion 3.7V or NIMH) then charging percentage image will flash meaning the start of charging. At the same time the LCD displays also charge voltage, capacity, time and current. When charge completes, it will display''100%''mean while it shows ''End'' on the LCD right down corner.

LCD display graphic reference: