Popped the top off the battery
Picture of the BMS board UP port connection
SW PCB pads
left is connected to RJ45 pin 3
right is connected to RJ45 pin 4
Multimeter measurements:
battery voltage between RJ45 pin 2 (+13.4V) and RJ45 pin 4 (-ve)
no voltage between RJ45 pin 3 and RJ45 pin 4
I've tried shorting RJ45 pins 3 & 4 for 3 seconds (to simulate a normally open (NO) push button switch) but doesn't seem to put battery in shelf mode
From manual:
Activation Switch Operation
The battery can be switched between active mode and shelf mode with the Activation Switch.
When the battery is in shelf mode, connect the Activation Switch to the RS485 UP Communica-
tion Port of the battery and press the Power Button. The dim blue LED light on the Power
Button will become bright blue to indicate that the battery has been successfully switched to
active mode. Please check the battery voltage to validate an active battery.
Prior to long periods of storage, disconnect the battery from the system, connect the Activation
Switch to the RS485 UP Communication Port of the battery, and long press the Power Button
for 3 seconds to switch the battery to shelf mode. The bright blue LED indicator will become dim
blue to indicate that the battery has been switched to shelf mode. In shelf mode, the battery has
a low self-discharge rate and can hold the charge for a longer period of time.