Note this product: Applicable to Makita, without battery. Simply insert the tool battery into the adapter and connect the red clip to the positive (+) and the black clip to the negative (-) of the vehicle battery.
eBay
Genuine Makita 18V Battery 18V 6Ah 9Ah for Makita BL1860B BL1850 BL1840 BL1830 Power Tool Battery and Fast Charger DC18RC
Aliexpress UK
【USB Port and TYPE C Port】 With 2 ports, a USB port and a TYPE C charging port.
eBay
18V Battery 6Ah For Makita With LED lithium ion replacement LXT BL1860B BL1860 BL1850 For Makita rechargeable power tool battery
Aliexpress UK
Power Inverter Generator- The 200W modifined sine wave portable power generator has usb & type C ports, led light, DC 18V to AC 110V /220V Outlet for device charging. Modified sine wave is more faster and steady.
eBay
12V Battery For Makita PA12 Ni-Mh Battery For Makita 1200 1220 1201 1222 1233SA/B1235 192681-5 4000mAh Power Tool Batteries
Aliexpress UK
Li-ion battery USB adapter for Makita 18V battery（BL1830/BL1840/BL1850 and so on）. -USB adapter Input 14V dc-21V dc, maximum 2A; Output 2 X USB 5V dc 2A. 1 x Li-ion battery USB adapter. - Flashlight Brightness 45lm; LED power consumption 1w; LED type chipwhite.
eBay
Battery Adapter For Makita 18V switch to Dewalt Mt20Dl For Dewalt 18V 20V tools for Makita Bl1830 Bl1860 Bl1815 Li-Ion Battery
Aliexpress UK
USB Li-ion Battery Adapter. USB adapter. 1 x Adapter(Only Adapter, No Battery). Output: 2 X USB 5Vdc 2A. for 14.4-18V Battery / for HongSong / for / for BoDa / for / for ZhiPu / for JiangMi. Press the button once to turn on the light, long press the button for two seconds to turn off the light.
eBay
18V 6.0Ah Powerful Replacement For Makita Compatible For Makita Battery BL1860 BL1850B BL1830 Series Battery Replacement Battery
Aliexpress UK
For Makita 18V LXT battery. Compatibility: Suitable for Makita 18V lithium battery(Battery not included). Equipped with 140lm Flash LED lighting system, Steady and Flash Modes, Two brightness, suitable for camping, working in darkness and many other occasions.
eBay
12V 4000mAh Battery For Makita PA12 Ni-Mh Battery For Makita 1200 1220 1201 1222 1233SA/B1235 192681-5 Power Tool Batteries
Aliexpress UK
Power Source:for Makita 18V Li-ion Battery. (battery not included). Power Inverter Generator- The 200W modifined sine wave portable power generator has usb & type C ports, led light, DC 18V to AC 110V /220V Outlet for device charging.
eBay
For Makita 10.8V-12V Li-ion Battery DIY Adapter Dock Power Connector Battery Output Adapter for Makita 12V Battery
Aliexpress UK
Total output power: ≤150W. For maikta 18V battery: BL1815, BL1815B, BL1820, BL1820B, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860, BL1860B, BL1845, BL1890, BL1890B. ②AC sockets are not suitable for the UK Plug with excessively long bottom pins; only suitable for the UK Plug with three equally long pins.
eBay
Battery Adapter for Einhell 18V Li-ion Battery Converter to for Makita 18V Lithium Battery Power Tools for Makita 18V Tool
Aliexpress UK