DAYTON AUDIO LBB-3v2 Lithium Battery Charger User Manual
- June 9, 2024
- DAYTON AUDIO
Table of Contents
DAYTON AUDIO LBB-3v2 Lithium Battery Charger User Manual
Dayton Audio LBB-3v2 2
- Batteries sold separately: 18650 x3
- Use only flat top 18650 batteries, and not 18650 batteries with a button top on the positive side
- Package includes
- LBB-3v2 x1
- 20” 2-conductor cable
- 8” 4-conductor cable
Power Supply
- Between 5 VDC and 24 VDC, center positive
- Recommended 1.5A capable
- 2.1 x 5.5mm center positive coax plug
Installing Batteries
- Plug in all wiring harnesses necessary for project before installing batteries
- Match the + side of the battery with the + marker on the LBB-3v2
- If a battery’s polarity is not marked, check for vent holes or a dimple around the rim of the positive side
Charging Tips
- The LBB-3v2 uses a BMS (Battery Management System) to monitor the voltage of each cell individually in order to charge them to the same capacity
- If one battery is significantly lower in charge than the others, it may take days for all batteries to reach full capacity
- Higher charge level batteries will be slowly drained before all cells are charged up together
- It is necessary to start with all new batteries with the same mAh capacity
- Remove the batteries before storing LBB-3v2 for a prolonged amount of time
- You must plug in the power supply to activate the battery board
- If a battery goes bad, the board will cease all output
Quick-Start Wiring Guide
- J11: 12 VDC power output
- J9: 12 VDC power output
- J7: 12 VDC power output
- S1: Momentary push button to show battery level status
- J12: External battery level status,
- J2: External charging LED indicator,
- J1: External power port indicator LED,
- J5: Feature extension port,
- J3: 5 – 24 VDC power input
- J4: 5 – 24 VDC power input
- J6: Solar panel input
Pinouts
| J1 Pin | Value |
|---|---|
| 1 | LED+ |
| 2 | LED- |
| J2 Pin | Value |
| --- | --- |
| 1 | LED+ |
| 2 | LED- |
| J4 Pin | Value |
| --- | --- |
| 1 | DC+ |
| 2 | GND |
| J5 Pin | Value |
| --- | --- |
| 1 | VIN |
| 2 | VIN |
| 3 | GND |
| 4 | GND |
| 5 | BATT |
| 6 | BATT |
| J6 Pin | Value |
| --- | --- |
| 1 | VIN |
| 2 | GND |
| J7 Pin | Value |
| --- | --- |
| 1 | BATT |
| 2 | BATT |
| 3 | GND |
| 4 | GND |
| J9 Pin | Value |
| --- | --- |
| 1 | BATT |
| 2 | BATT |
| 3 | GND |
| 4 | GND |
| J11 Pin | Value |
| --- | --- |
| 1 | BATT |
| 2 | GND |
| J12 Pin | Value |
| --- | --- |
| 1 | BATT |
| 2 | SWITCH |
| 3 | LED4 |
| 4 | LED3 |
| 5 | LED2 |
| 6 | LED1 |
Output Current Capabilities
How much current your project draws will be the limiting factor when using any
battery pack. Do not connect project directly to batteries, use only the
voltage output ports of the LBB-3v2. Otherwise, over-current protection will
not function.
Use the following guidelines to determine which LBB-3v2 output ports will work
best for your project:
- Higher Current Applications – Use J11 when a high amount of current is needed for extended periods of time
- Examples of high current uses: larger amplifier boards, LED arrays, large DC motors
- Lower Current Applications – Use J9 when less current is needed
- Examples of lower current uses: small/medium amplifier boards, smartphone battery bank, PC fans
- Maximum Current – The LBB-3v2 is capable of supplying 5A total at 12VDC from the outputs, for a combined output of 60W
J1 – External power port indicator LED
J1 can be used as an external indicator to display the ON/OFF status off the
battery board. Following the pinout on page 4, an LED can be connected such
that an ON status indicates the board is active and an OFF status indicates
the board is inactive. This external LED will serve the same purpose as D11 on
the board just above J1.
J2 – External charge indicator LED
Similar to the function described above in J1, J2 is used as an external
indicator to display the charging status of the battery board. ON indicates
the board is charging, OFF indicates the board is not charging, or has
completed charging if the board is plugged in. This serves the same function
as D14 on the board just above J2.
J5 – Feature extension port
The feature extension port is a part of what makes the Dayton Audio line of
battery modules so versatile. Being mindful of the pinout on page 4,
accessories can be plugged into J5 to expand the options the battery board
provides. The Dayton Audio LBB-5EB Expansion Board is an easy and effective
way to add a 5VDC output to your project. This will allow you to charge
smartphones and power other 5VDC devices. The LBB-5EB also has a DC jack to
charge the battery board externally. J5 power specification: 5VDC, 2A maximum
output
J12 – External battery status indicator LEDs
J12 can be used as an external indicator to display the battery level status
of the board, serving the same purpose as D17, D18, D19, D20, just above J12.
Following the pinout on page 4, four LEDs and a momentary button can be
connected such that the battery level is displayed by the 4 LEDs while the
button is depressed. The Dayton Audio LBB-5CL is an easy way to implement all
external LED functions. Pressing the momentary button will illuminate the
number of LEDs corresponding to the approximate status of the battery.
- LED = 25%
- LEDs = 50%
- LEDs = 75%
- LEDs = 100%
Troubleshooting
Battery board not supplying power – Remove then replace one battery (new
battery not necessary) and momentarily plug in your power supply. This will
restart the charging circuit and will reactivate the battery supply
LBB-5EB expansion not working – ensure the LBB-5EB is plugged into the
extension port (J5) and not the external battery charge status socket.
Note: The Dayton Audio LBB-3v2 is an independent battery holder board and its design does not work with Dayton Audio KAB board’s built-in charge circuit. Plug the LBB 3v2 into the two wire DC input on the KAB boards or use Dayton Audio battery board KAB-BE with Dayton Audio KAB Bluetooth amp boards
Specifications
Output voltage: 12 VDC @ 5A Max (combined outputs)
Supply: 5 – 24 VDC, at least 1.5A recommended
DC jack: 2.1 x 5.5mm center positive
Dimensions: 3.60 x 2.70 x 1.30 inches
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