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Lithium BLUE – TROUBLESHOOTING
URGENCY
HIGH:
Action immediately
PRODUCTS CONCERNED
Discover Lithium BLUE Series
POSSIBLE SYMPTOMS
Refer to the latest version of the Manual https://assets.discoverbattery.com/documents/dl_blue/opm-dl-blue-manual.pdf.
Bluetooth will not connect:
Usually this is an issue on the connection device, rarely is there ever an issue with the battery bluetooth module.
Steps to resolve this issue:
Reset apps on connecting device (sometimes they can be running in background).
Check that no other devices are connected to the battery, one battery can only connect to one device each time.
Perform a BMS power reset (remove top cover/BMS, disconnect from battery, reconnect, and reinstall).
Charging issues / over voltage protection fault:
Generic lithium settings of many chargers on the market are too high.
Many manufacturers have moved to higher charge voltage settings. Discover charge specifications are based in
the interest of cell health and longevity.
a. Over voltage protection is triggered at >3.65V/cell; charger output may fluctuate and trigger protection even at
slightly lower settings.
Refer to the Manual for protections (section 2.4) and charge settings (section 7.4).
Discharge issues / low voltage protection fault:
Low voltage protection (2.5V/cell) should not be used as cut-off as it is the last line of defense.
Set low voltage cut-off at 3.0V/cell.
Storage / dead battery issues:
Failure to monitor the battery charge status can result in the battery becoming over-discharged and damaging cells
beyond recovery (affecting battery life expectancy and performance or becoming non-functioning).
Fully charge the batteries prior to storage.
Battery terminals should be disconnected. Many devices don't have a physical switch that disconnects power, but
rather shut down electronically. Parasitic power draws accelerate draining the battery.
Refer to the Manual section 11.
Batteries that have not been maintained and are left to over discharge need to be removed from service.
BMS Charge/Discharge control circuit damage:
The power electronics on the BMS can be sensitive to excessive ripple (usually a load such as a microwave) and
undersized wires. When either charge/discharge or both circuits are damaged, the battery will not allow either
charge/discharge or both.
To identify this, the battery will not be in fault or protection mode, but with a load the voltage gradually drops as if
there is a fault when attempt to discharge.
CUSTOMER SERVICE BULLETIN
MEDIUM:
Action by next possible occasion
MODEL
PART NUMBER
DLB-G24-12V
900-0046
DLB-G24-24V
900-0047
DLB-G24-36V
900-0048
Battery Voltage
Over Voltage Protection
12V
24V
36V
Battery Voltage
12V
24V
36V
CSB Number
Date
LOW:
Action if necessary
MODEL
DLB-GC12-12V
DLB-GC12-24V
>14.6V
>29.2V
>43.8V
Low Voltage Cut-off
12.0V
24.0V
36.0V
855-0015 Rev A
MAY 15 2023
GENERAL:
General Information
PART NUMBER
900-0049
900-0050
Page 1 of 2
F orm: 880-0015 Rev A