12V/24V → 18V In-Car Charger

The Volt Replenisher - 12V Tool Battery Vehicle Charger

12V/24V → 18V In-Car Charger

The Volt Replenisher

Name: The Volt Replenisher - 12V Tool Battery Vehicle Charger
Brand: Max Voltage Store
Availability: InStock

From $99.95

1 Battery Type

Pairs well withAdd-ons match your battery brand automatically

The Volt Dropper Run 12V fridges, fans and gear straight off the batteries you just charged. $99.95 Double Battery Adapter

Double Battery Adapter Run two batteries side by side - double your off-grid runtime. $74.95 The Volt Mini | 18V Tool Battery USB Fast Charger

The Volt Mini Pocket USB-A + USB-C charger that clips onto your battery for phones & GPS. $29.95 The Volt Booster | Portable 180W Pure Sine Wave Inverter | 240V

The Volt Booster | Portable 180W Pure Sine Wave Inverter | 240V

The Volt Booster Turn your tool batteries into 240V mains power - pure sine wave, anywhere. $119.95

same or next business day ⚡ Next-day delivery available in select areas

Secure checkout

AUS owned & operated

Same or next day

30-day returns

2-year warranty

The Volt Replenisher key specs - 2A steady charge current, 18 to 21V charging output, 12/24V any vehicle socket, 3 safety protections, 3-way protection, charge while you drive, AUS designed and tested

How long to top up?

Charge-time calculator

⚡ The Volt Replenisher 12V/24V in · 18–21V · 2A charge

1 Your battery size

2 Starting charge

3 How many batteries?

Charges one battery at a time - multiple packs charge one after another.

How we calculate it - check our maths

A guide only - real charge time depends on battery condition, temperature and your vehicle’s output.

In the wild

See it in action

Tap for sound

★★★★★ Trusted by Aussie campers, tourers & tradies

Don’t take our word for it

The fine print

Full specifications

Input	12V or 24V DC vehicle socket (cigarette lighter / accessory)
Output	18–21V DC, up to 2A (≈ 36W)
Charging	One 18V tool battery at a time (slide-on mount, brand-specific)
Status	LED indicators - charging / full / fault
Protection	Overheating, overcharge & short-circuit protection
Battery compatibility	Makita, Milwaukee, DeWalt, Ozito/Einhell, Bosch (GBA & PBA), HiKOKI/Hitachi, Stanley/Craftsman, Black & Decker/Porter Cable, WORX (5-pin), AEG, Ryobi - each unit brand-specific
Not compatible with	12V, 14.4V, 36V or 40V battery platforms
Design	Compact, lightweight & glove-box friendly
Origin & support	Australian owned & operated, local support · 30-day returns

Download the product manual (PDF)

Up and running in seconds

How it works

Plug into your vehicle - any 12V or 24V cigarette/accessory socket.

Clip in your battery - slide on your 18V pack; the LED confirms charging.

Drive & charge - top up on the move and arrive with power ready.

Built-in protection

Your batteries are protected, always.

Smart charging with three-way protection built in - plug in and drive without babysitting it.

Overcharge cut-off

Stops automatically once the pack is full - no risk of overcharging.

Thermal protection

Monitors temperature and pauses charging if things get too warm.

Short-circuit shutdown

Instantly cuts power on a fault - protecting the charger and your battery.

Can I leave it charging?

Yes - the protection lets you plug in and drive without watching it. Just unplug when the engine’s off so you don’t draw down your vehicle battery.

Where it shines

Perfect for

Camping & fishing

Charge while you drive so you arrive with power for fridges, lights, pumps and fans.

4WD touring & overlanding

Top up batteries on long tracks and remote routes without mains power.

Tradies on the move

Recharge tool batteries between jobs straight from the ute.

Off-grid & vehicle setups

An ideal backup charging solution when mains power isn’t available.

Why the Replenisher?

The smarter way to stay charged

Charge while you drive

Turn every drive into charging time - arrive with batteries ready to go.

No mains, inverter or solar

Plugs straight into your 12V/24V socket. No panels, no inverter, no fuss.

Brand-specific fit

A proper mount for your exact 18V platform - 12 brands covered.

Real support, here in AUS

Australian owned & operated, with 30-day returns and warranty honoured locally.

Good to know

Questions, answered

Which battery should I pick?

Choose the brand of the 18V batteries you already own - the Replenisher has a proper mount for each platform. Each charger is brand-specific and not cross-compatible. If your brand isn’t listed, get in touch.

Can I charge batteries while driving?

Yes - that’s exactly what it’s for. Plug into your car’s 12V or 24V socket and top up your batteries on the road.

Will it fast-charge my batteries?

It’s designed for safe top-ups at 2A - ideal for keeping batteries alive off-grid, not rapid charging. As a guide, a 4Ah pack tops up in about 2 hours of driving. Use the calculator above for your exact pack.

Is it safe for my batteries?

Yes - it has built-in overheating, overcharge and short-circuit protection, so it stops automatically when the pack is full.

Can I use it in a caravan, boat or truck?

Absolutely - any 12V or 24V power socket works, including caravans, boats and trucks.

Do batteries come included?

No - this is the charger only. Pick the variant that matches the 18V batteries you already own.

Is it good for long camp stays?

It’s perfect for overnighters and weekenders where you’re driving between spots. For long stationary camps without driving, pair it with solar or a dual-battery system.