Suitable with Mutian to Daiyi A 3 battery conversion and Daiyi A 3 to Mutian tool, this premium battery adapter ensures safe power transfer without voltages fluctuations or sudden disconnections Perfect for extending battery utility in workshops, job sites, or home projects where multiple tool brands is used interchangeably Crafted from sturdy, its delicate design integrates over charging / discharges protections and short circuits for worry release tool operations Streamlines your workflows with this functional battery converters that maintains tool while eliminating brand locking battery restrictions Ideal for professional tradespeople and craft enthusiasts requiring crosses brand battery compatibility between two brand power tool, Manufacturer: KieTeiiK