This Replacement Lead-Acid Battery is a direct replacement lead-acid battery for the Hydrocell 17L Tradie Tough washer (GFS-CT1), made to keep Aussie HVAC techs moving.

If your washer battery is flat, weak, or not holding charge, this is the simple fix to get you back to clean coil rinses and fewer call-backs.

It’s also handy as a spare, so you’re not stuck waiting for a recharge between jobs.

Best for: HVAC techs, installers, maintenance teams, and capable DIY-cleaning customers who want their Hydrocell 17L washer ready for back-to-back cleans.

Compatible with: Hydrocell Tradie Tough Portable Pressure Washer w/ 17 Litre Tank (GFS-CT1) only. If you’re running a different model, check the model code before ordering.

Features

• Replacement lead-acid battery to get your GFS-CT1 washer running again
• Trade-friendly backup option to reduce downtime between service calls
• Matches the lead battery style used in the Hydrocell 17L lead unit
• Simple swap once you access the battery compartment (follow the Hydrocell manual)
• Ideal for HVAC coil rinsing work where you can’t afford a flat battery

Technical Specifications

• Battery type: Lead-acid (sealed lead-acid style used in the GFS-CT1 lead unit)
• Voltage: 12V–15V (DC)
• Capacity: 4.5Ah
• Rating: 20HR rate
• Compatibility: GFS-CT1 (17L Tradie Hydrocell Washer) only

What’s in the Box

• 1 × Replacement Lead-Acid Battery (for GFS-CT1)

Why “Downtime Saver”?

• Fixes the most common issue: a battery that won’t hold charge
• Keeps your portable washer ready for on-site coil rinsing
• Helps you finish jobs without waiting around for a recharge
• Easy to keep as a spare in the van (store safely and upright)

Using Your Battery: Step-by-Step

1. Turn the washer OFF and unplug any charger leads.
2. Let the unit cool down and dry off the outside if it’s wet.
3. Open the battery compartment as per the Hydrocell user instructions.
4. Take a quick photo of the wiring so you can match polarity on re-fit.
5. Disconnect the old battery and install the replacement lead-acid battery.
6. Reconnect firmly, close the compartment, then charge fully before first use.
7. Do a short test run before heading to your next job.

Limitations & Safety Notes

• Only suits the 17L Tradie Hydrocell Washer (GFS-CT1). Not for lithium units.
• Do not install while the unit is charging or powered.
• Do not short the terminals. Keep metal tools away from contacts.
• Do not use on live electrical components. Keep hands dry during installation.
• Recycle lead-acid batteries through approved battery recycling points.
• Follow Safe Work guidance and the equipment manual for battery handling.

Shipping & Returns

We ship Australia-wide. For dispatch timeframes, delivery info, and return steps, please see our Shipping & Returns page

Why Buy From HVAC Shop

• Aussie-based support that understands HVAC cleaning work
• Fast shipping Australia-wide (delivery options shown at checkout)
• Trade-tested HVAC tools, parts, and spares
• Secure checkout and easy ordering
• Help with sizing and compatibility before you buy

Want the complete setup? If you want the full cleaning bundle, grab the Hydrocell A/C Cleaning Kit (17L + Hydrobag + Pressure Washer) for a ready-to-go kit.