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A Makita battery will power a Mellif tool only if that exact Mellif model supports the battery platform. Mellif sells tools for different, non-interchangeable battery groups; its green group is the one it identifies as compatible with Makita batteries. Check the tool model first, then troubleshoot charge, seating, and visible contact problems. If the model is not listed as Makita-compatible, don’t force the pack or try to adapt it.
First, confirm the exact Mellif tool supports Makita batteries
Mellif’s battery FAQ says, “The color indicates battery compatibility. They are not interchangeable.” Mellif identifies green batteries with tools compatible with Makita batteries, but color is only a clue within Mellif’s system—not proof that every Mellif tool accepts a Makita pack. Check the model number on the tool and confirm its manual or current product listing explicitly names Makita 18V compatibility. Mellif’s battery and charger FAQ and its list of tools advertised as compatible with Makita 18V batteries can help identify the platform.
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Makita says its 18V LXT batteries are compatible within the LXT platform. That statement applies to Makita’s platform; it does not confirm compatibility with a particular Mellif product. Neither the tool’s brand nor the battery’s nominal voltage alone establishes a match.
Troubleshoot a confirmed compatible pairing
- Check the battery’s charge. Use its charge indicator, if present. If it needs charging, use only a charger specified for that battery. Mellif says its replacement battery must be charged with the matching Mellif charger; do not assume a charger is interchangeable just because the battery fits a tool.
- Switch the tool off and reseat the battery. Remove the pack, look for visible dirt or damage at the contacts, then reinstall it fully. It should seat without force. A Makita adapter manual lists a loose or unconnected adapter as one possible reason equipment will not start, but that is general guidance—not a Mellif-specific diagnostic chart.
- Isolate the likely faulty part, if you have known-good compatible equipment. Try a known-good, correctly matched battery in the Mellif tool, or try the suspect battery in a known-good tool that explicitly supports it. If the problem follows the battery, the pack may be at fault; if it stays with the Mellif tool, the tool may need service. Skip this check if you cannot verify compatibility.
- Stop if anything is hot, damaged, or behaving abnormally. Do not keep testing a hot or visibly damaged battery or tool. Makita’s general manual guidance is to let overheated equipment cool and to seek authorized repair if a fault persists. Follow the Mellif tool’s own instructions and warranty terms.
For any inspection, keep the tool switched off and avoid probing, bridging, or shorting battery terminals. Do not use an unapproved adapter or alter the battery or tool to make an incompatible pack fit.
#1 Best Overall
- For M18 to for Makita 18V Battery Adapter: convert for M18 battery to work for Makita 18V cordless tool, or convert for Makita18V battery to work for M18 cordless tool.
- This is only a battery adapter to convert for M18 to for Makita, only adapter included in package, no battery.
- Portable: this battery adapter is much lighter and smaller than battery, you can take it for business trip easily.
- Easy to use, just insert this converter into battery, then insert it into power tools. your battery can work for M18 or for Makita power tools.
- No matter what product problem, please enter the product details page and Click the "DGXYX" under the shopping cart, then click "Ask the question" to send message, we'd solve it right away.
When to replace a battery—or contact service
Consider a replacement battery only after confirming that the tool supports that battery platform and the original pack appears to be the faulty component. Mellif describes its 18V 4.0 Ah replacement battery as compatible with Makita-compatible Mellif tools and advises checking the tool model. That is Mellif’s product claim, not independent test evidence. Its listing also specifies a matching Mellif charger.
A replacement will not solve a platform mismatch or a fault in the tool itself. If a confirmed compatible battery is charged and fully seated but the tool still will not run, stop troubleshooting and contact Mellif or an authorized repair service. The title alone does not identify the tool model, battery model, or failure pattern, so it cannot establish the specific cause.
Quick Recap
Best Value
- Function: MT20DL battery adapter Compatible for Makita 18v battery converts to DeWalt 18v-20v Max battery, perfect replacement for Dewalt 18-20 volt cordless power tools battery.
- Compatibility: Convert adapter top port compatible with Dewalt 18-20 volt cordless power tools. Convert adapter bottom port compatible with Makita 18v batteries(BL1815、BL1820、BL1830、BL1830B、 BL1840、BL1850 、BL1850B、BL1860 ) etc.
- Safety: Echoyee convert adapter built-in voltage protection chip, comply with FCC RoHS and CE security testing standards, made of high quality ABS plastic, safe and durable.
- Notice: Converter can't be used for power tool battery charging, this adapter will not fit into any chargers.
- Warranty: Get 1*MT20DL adapter（battery not included） & 1*manual, one-year warranty!
Rank #4
- Compatible Model: Compatible for Milwaukee M18 18V battery 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822 and Dewalt 20V battery DCB200, DCB201, DCB203.
- Compatible Tools: Working Compatible for Makita LXT Tools and also compatible for BL1830 18V BL1830 BL1840 BL1850 BL1860 Power Tools
- Function: DM18M battery adapter converts for DeWalt 20v & Milwaukee M18 18v lithium batteries to (Compatible with Makita) 18v lithium battery
- USB and Type-C connector design: When connected to the battery, you can quickly charge your cell phone, iPad, Airpods and other small electronic devices anytime, anywhere (Charging cable not included)
- Safe and Reliable: Echoyee convert adapter built-in voltage protection chip, comply with FCC RoHS and CE security testing standards, made of high quality ABS plastic, safe and durable.
Rank #3
- For DeWalt Battery Adapter, Convert for DeWalt 20V 60V battery to Work for Makita 18V Tool Adapter
Rank #2
- BATTERIES COMPATIBILITY: Our battery adapter with switch is compatible with Makita 18V lithium battery, work for BL1820B/BL1840B/BL1850B/BL1860B/BL1830/BL1840/BL1850/BL1860 and more. Battery adapter connector is designed to close-fit, ensures stability and prevents the connection from loosening during use
- OVER-CURRENT PROTECTION: Upgraded power adapter with 30Amp fuses and fuse holder with rubber cap, effectively prevents battery and connected devices damage from over-current. Heat-resistant 12AWG wiring improving safety and reliable power supply
- OVER-CURRENT PROTECTION: Upgraded power adapter with 30Amp fuses and fuse holder with rubber cap, effectively prevents battery and connected devices damage from over-current. Heat-resistant 12AWG wiring improving safety and reliable power supply
- PREMIUM & CONVENIENT DESIGN: 18V battery adapter made from premium ABS material. Easy to install and remove, simply slide the adapter into the battery slot and lock it, and press the the buckle of the battery to remove it. The two fixed screw holes on the adapter can be easily installed on walls or DIY items, providing convenience
- 2-PACKS CONVERSION KIT: This power connector adapter is not a charger, only outputs voltage and power directly from the battery. Package includes 2 battery adapters with fuse holders, 2 wire terminals, 6 fuses, 4 screws, and 4 drywall anchors. Ensure correct polarity connection. If not used for a long time, please remove the battery from the adapter to prevent unnecessary discharge and preserve battery life
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