If your trusty Makita 6391D drill has been riding in your work truck for years — the chuck still spins true, the two-speed gearbox clicks smoothly into place — but the battery no longer lasts from smoko to lunch, you already know the most common story about this tool. The drill almost never dies first. The old Ni-MH pod wears out long before the motor, and that is exactly where our 18V 3.0Ah replacement battery steps in.
Aftermarket Makita 6391D battery is built to meet or exceed original OEM specifications, delivering 3000mAh of steady 18V power with no memory effect that plagued older Ni-Cd packs. That means you can top it up whenever it suits you, no strict full-discharge conditioning cycles required. It costs a small fraction of upgrading to an entirely new power tool platform, while keeping your entire legacy Makita 18V tool family working reliably.
This single replacement pod is compatible with a huge range of older Makita 18V equipment, far beyond just the 6391D and its 6391DWPE kit variant. It works across drills, drivers, reciprocating saws, jigsaws, circular saws, mitre saws, and even site gear like the BMR100 jobsite radio, ML183 torch and UB181D blower. It directly replaces part numbers including 1822, 1823, 1833, 1835, PA18, 192826-5 and many more listed on our full product page.
To get the longest runtime and service life from your new power tool batteryt pack, follow these simple Aussie work-site friendly habits: let the battery cool down to 10–30°C before charging after sitting in a hot ute or tin summer shed, unplug it once charging completes, top up stored packs every 3 months, and clean the metal contacts occasionally with isopropyl alcohol to remove dust and oxide that drains performance.
Top 5 most frequently asked questions from Australian tradies about 6391D tool battery:
- Will this fit a 6391DWPE? Yes. The 6391DWPE is the original kit version of the 6391D, and this replacement pod fits perfectly while working safely with your original-era Makita charger.
- Can I use my original charger? Absolutely. No new charger purchase is needed — this pack is fully designed to work with the original Makita charger that came with your tool.
- Is this a genuine Makita battery? No, it is a high-quality aftermarket replacement built to meet or exceed OEM standards, backed by CE and RoHS certification.
- How long will it run on a charge? In normal intermittent drilling and driving, a healthy 3.0Ah pack easily gets you through half a typical workday. For long runs of structural screws, keep a second pack on rotation.
- My old pack says Makita 1822, 1835 or PA18 — will this still fit? Yes. Those are just different labels and capacity variants of the same physical pod family, and this replacement will work perfectly.
Every order ships from Australia with AusPost fast free shipping, full 1-year warranty and 30-day money-back guarantee. Keeping your serviceable Makita 6391D battery in use is the most practical, low-cost way to cut unnecessary landfill — one more year out of a good drill means one less whole tool heading for the bin.