Battery Saver Kit for Rechargeable Lithium and SLA Batteries
Refer: Silicon Chip Magazine September 2013
This tiny circuit fits in between the battery and load and cuts off the power when the battery becomes flat to prevent the battery over-discharging and becoming damaged. Suitable for use with cordless power tools, emergency lights, small to medium UPS (up to about 300VA) and a wide variety of other devices.

• Suits most SLA, Li-ion, Li-Po and LiFePO4 batteries between 6 to 24V
• Uses very little power (* Handles 20A continuous, 30A peak (Charge or discharge)
• Cut-off voltage adjustable from 5.25 to 25.5V
• 0.3 - 2V hysteresis, depending on battery type and voltage
• Small PCB to fit in small spaces (38 x 18.5mm)
• Battery can be recharged once cut-out has engaged (maximum 1.5A)

There is also provision for connecting an LED or external buzzer (not included)

Supplied with double sided, soldermasked and screen-printed PCB with SMDs pre-soldered*, voltage setting diodes and resistors, and components.
PCB size: 34 x 18.5mm

*Note: We've pre-soldered all of the surface mount components to save you time and frustration, apart from the three voltage setting resistors.
Assembly required
Kit Form Short Form (circuit only)
Difficulty Detailed
PCB Length 34mm
PCB Width 18mm
Application Field Battery Saver Kit for Rechargeable Lithium and SLA Batteries
Estimated Construction Time 60min
Tools required Soldering Iron,Flat Head Screwdriver


Brand Jaycar

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