The Khadas RTC battery is an "Energizer CR1220" button battery attached to a 60mm long pigtail with JST female connector (1mm pitch). Simply plug-and-play with a VIM3/3L/2/1, Edge-V or Captain board.
 
The battery can be securely pasted to the board with the 3M adhesive pad (already attached). See the pictures for usage information and important specifications.
 
This RTC battery will keep the SBC's Real-Time-Clock powered and counting even when USB-C power is unavailable.
 
Information:
Model - Energizer No. CR1220
Designation - ANSI / NEDA-5012LC, IEC-CR1220
 
Properties:
Chemical System - Lithium / Manganese Dioxide (Li/MnO2)
Battery Voltage - 3V (volts)
Charge Current - 1uA (microamperes)
Capacity - 40mAh to 2.0V, 45k ohms at 21C (degrees celsius)
Energy Density - 153 milliwatt hr/g, 464 milliwatt hr/cc
Typical Lifespan - 2.85V to 2.90V for 600 hours at 21C (Simulated Test)
 
Dimensions:
Diameter - 12.50mm
Thickness - 2.00mm
Cable Length - 60.0mm
 
Connector:
Type - JST Female (1mm Pitch)
 
Compatibility:
VIM4
VIM3/3L
VIM2
VIM1
VIM1S
Edge-V
Captain
 
Documentation:
Datasheet
Press-Kit
 
Certifications:
Underwriters Laboratories component recognition
 
In The Box:
RTC Battery (w/ 3M adhesive pad attached)