Max Voltage Store
The Volt Range
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2-YearWarranty
≥95%Efficiency
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AUSDesigned & Tested
18V → 12V DC Converter
The Volt Dropper
Stable, adjustable 12V power from your tool battery - run fridges, lights, fans and accessories anywhere.
MakitaMilwaukeeDeWaltRyobiOzitoBosch GBABosch PBAAEGHiKOKIStanleyBlack & Decker
Quick Start
1
Insert a compatible 18–20V tool battery until it clicks and locks.
2
Connect your 12V appliance to the output connector (Anderson or cigarette socket).
3
Turn the voltage knob to maximum (~13V). Confirm on the LED display.
4
Monitor your device for abnormal heat, smell, or a flickering display.
5
When done, switch off the isolator, unplug the device, then remove the battery.
Keep the output dial at maximum (~13V) for best runtime. Only adjust if your device requires a specific lower voltage.
Technical Specifications
| Input Voltage | 15–20V DC (18–20V lithium-ion tool batteries) |
|---|---|
| Output Voltage | Adjustable 5–13V DC (default: maximum ~13V) |
| Max Output | 10A continuous total load |
| Efficiency | ≥95% typical |
| Display | Digital LED - real-time output voltage |
| Operating Temp | −10°C to 45°C, dry environments only |
| Protection | Overload / Over-current / Low-voltage cut-off / Short circuit / No-load auto-off |
⚠ DO NOT EXCEED 10A total draw - risk of overheating and damage to the unit.
Best Practices (Fridges)
- Pre-cool your fridge on 240V before leaving home - saves battery significantly.
- Use ECO mode where available and keep the lid closed.
- Keep the fridge at least half-full of already-cold food and drinks.
- Keep connectors clean and fully seated to reduce voltage drop.
- Keep a spare charged battery on hand for longer trips.
Protection Features
- Low-voltage cut-off - protects your tool battery from over-discharge (cuts around 15V input)
- Over-current & overload shutdown - triggers if load exceeds rated limits
- Short-circuit protection - safe against output shorts
- No-load auto-off - powers down when nothing is connected
If protection triggers: disconnect the load, remove the battery, wait 30 seconds, then reconnect.
Troubleshooting
| Problem | Likely Cause | Fix |
|---|---|---|
| No power / display off | Battery not seated, flat, or wrong variant | Re-seat battery, try charged battery, confirm variant matches your brand |
| Turns off during use | Battery depleted, load >10A, or protection triggered | Check knob is fully clockwise. Reduce load, cool down, swap battery |
| Appliance won't start | Not 12V DC, poor connection, wrong voltage | Confirm device is 12V DC, re-seat connector, set output to max |
| Display flickers / voltage drops | Loose plug, overload, or low battery | Re-seat plugs, try smaller load, use freshly charged battery |
Safety Warnings
⚠ Use only 12V DC appliances. Do NOT connect 240V AC devices.
⚠ Do not exceed 10A total draw. High-draw devices may cause shutdown or overheating.
⚠ Do not use in rain or allow water into connectors.
⚠ Remove the battery after use. Do not leave batteries attached for long-term storage.
Dual Battery Parallel Adapter
The Volt Double Adapter
Run two matching 18V batteries with your Volt Dropper for double the runtime - no more midnight battery swaps.
MakitaMilwaukeeDeWaltOzitoBosch GBABosch PBAHiKOKIStanleyBlack & DeckerWorx (4-Pin)
How It Works
The Double Adapter connects two batteries in parallel - voltage stays the same (18V) but available capacity doubles. Load is shared across both packs, reducing strain on each battery compared to running a single pack.
Quick Start
1
Confirm you have the correct variant for your battery brand.
2
Insert Battery 1 until it locks firmly.
3
Insert Battery 2 until it locks firmly.
4
Connect the Double Adapter to the Volt Dropper and power your device.
5
When done, disconnect from the Dropper and remove both batteries.
Battery Pairing Guide
- Use two batteries of the same brand and same voltage (18V).
- For best results, use the same capacity (e.g., two 5.0Ah).
- Match charge level as closely as practical before connecting (within ~0.2–0.3V).
- Avoid pairing a new battery with a very old one - resistance differences cause uneven discharge.
⚠ Do NOT mix battery brands or platforms. May cause damage.
Specifications
| Battery Type | 18V lithium-ion tool batteries (variant dependent) |
|---|---|
| Connection | Parallel dual-battery |
| Primary Use | Extend runtime with the Volt Dropper |
| Charging | Not supported - this adapter does not charge batteries |
Troubleshooting
| Problem | Likely Cause | Fix |
|---|---|---|
| Short runtime | Batteries mismatched or one pack is weak | Use matched batteries; test each individually; replace weak pack |
| One battery hot | Imbalance or high load | Stop use; allow cooling; ensure same capacity/age; reduce load |
| Intermittent power | Battery not locked or dirty contacts | Remove and reinstall; clean contacts; confirm firm lock |
If protection triggers: disconnect load, remove batteries, wait 30 seconds, reconnect.
In-Vehicle Battery Charger
The Volt Replenisher
Plug into any 12V or 24V vehicle socket and top up your 18V tool battery while you drive - no inverter needed.
MakitaMilwaukeeDeWaltOzitoBosch GBABosch PBABlack & DeckerHiKOKIStanleyWorx (5-Pin)
Quick Start
1
Start the vehicle or ensure the accessory socket is powered.
2
Plug the Replenisher firmly into the 12V/24V accessory socket.
3
Insert your compatible battery until it locks.
4
Confirm the charge indicator LED shows charging.
5
When charging is complete, remove the battery first, then unplug the charger.
For best results, charge while driving - alternator supply is typically stable and consistent.
Specifications
| Input | 12V or 24V vehicle accessory socket |
|---|---|
| Output | 18–21V DC, 2A (typical) |
| Indicator | LED charging status indicators |
| Protection | Overheat / overcharge / short-circuit |
This is a steady 2A charger - not a rapid charger. Charging will take longer than a mains charger.
Troubleshooting
| Problem | Likely Cause | Fix |
|---|---|---|
| No lights / not charging | Socket not powered, blown fuse, poor connection | Check accessory power, re-seat plug, try another socket, check vehicle fuse |
| Stops charging early | Overheat protection or unstable socket | Allow to cool, ensure stable power, avoid charging in direct sun |
| Battery won't seat | Incorrect variant | Confirm battery platform - select correct charger variant |
USB Power Adapter
The Volt Mini
Pocket-size USB power from your 18V tool battery - charge phones, GPS, headlamps and more, anywhere.
MakitaMilwaukeeDeWaltOzito / Einhell
Quick Start
1
Insert a compatible tool battery until locked.
2
Connect your device using USB-A or USB-C.
3
If USB-C to USB-C doesn't work, try a USB-A to USB-C cable instead.
4
When finished, unplug cables and remove the battery.
Specifications
| Input | 18–20V tool battery (variant dependent) |
|---|---|
| Outputs | 1 × USB-A + 1 × USB-C |
| Max Output | Up to 18W total |
| Mounting | Belt clip / portable |
| Note | Does not charge tool batteries - draws from battery only |
Troubleshooting
| Problem | Likely Cause | Fix |
|---|---|---|
| Device not charging | Incompatible cable | Try USB-A to USB-C cable if USB-C to USB-C doesn't work |
| Stops charging | Battery low or protection triggered | Swap to charged battery; disconnect and reconnect after 30 secs |
| Loose fit | Battery not locked | Remove and reinstall until it clicks firmly |
100W USB-C PD Adapter
The Volt Rapid
High-power USB-C PD for laptops, Starlink Mini, drones and demanding devices - powered by your 18V tool battery.
MakitaMilwaukeeDeWaltOzitoBosch GBABosch PBAHiKOKIStanleyBlack & Decker
Quick Start
1
Insert a compatible battery until locked.
2
Connect your device to USB-C (preferred for high power) or USB-A.
3
Green lightning indicator = fast charging active.
4
When done, unplug cables and remove the battery.
Use a high-quality 100W-rated USB-C PD cable for best laptop performance.
Specifications
| USB-C Output | DC 5–20V, PD 3.0, up to 100W max |
|---|---|
| USB-A Output | 5–12V, QC 3.0, up to 24W max |
| Indicator | Battery level + fast-charge (green lightning = fast charge) |
| Auto Shut-Off | Yes - when idle |
| Protection | Over-discharge / low-voltage protection |
100W is the maximum - actual power depends on device, cable, and battery condition.
Troubleshooting
| Problem | Likely Cause | Fix |
|---|---|---|
| Slow charging | Cable not rated or device limit | Use 100W-rated USB-C cable; try USB-C PD; swap to charged battery |
| No output | Battery not seated or protection triggered | Re-seat battery; disconnect loads; retry after 30 secs |
| Battery won't charge | Model limitation or conflicting load | Disconnect external devices; confirm variant supports battery charging |
General Safety & Battery Guidelines +
⚠ Use only compatible 18–20V lithium-ion tool batteries. Do not use damaged or swollen batteries.
⚠ Do not operate in explosive atmospheres or wet conditions.
⚠ Remove batteries when not in use or for storage/transport.
- Do not expose batteries to high heat or open flame.
- Allow airflow around the product during use - do not cover vents.
- Store indoors, dry, out of direct sunlight.
- Dispose of batteries via appropriate recycling facilities.
2-Year Warranty - We Stand Behind It
Every Volt product is covered for 2 years from purchase. Defects in materials or workmanship? We'll replace it - we even cover the shipping.
Contact Support →support@maxvoltagestore.com - ABN 56 597 760 054
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