S1 12V Vehicle Charging Kit
S1 12V Vehicle Charging Kit (view 2)
S1 12V Vehicle Charging Kit (view 3)
S1 12V Vehicle Charging Kit
S1 12V Vehicle Charging Kit (view 2)
S1 12V Vehicle Charging Kit (view 3)

S1 12V Vehicle Charging Kit

$25.00 USD

Keep your S1 Dry Flush toilet's battery topped up on the road. This charging kit plugs into any 12V–24V cigarette lighter socket, or can be hardwired directly into your RV or vehicle's electrical system for a permanent, out-of-sight install.

Features:

  • Plug-and-play or hardwire — use the included cigarette lighter plug, or trim it off and wire the charger straight into your RV's 12–24V DC system
  • Purpose-built connector — the 5.5 x 2.1mm output connector is the waterproof-rated connector that mates with your S1's charging port
  • LED charging indicator — red light while charging, green light once the battery is fully charged, so you can check status at a glance
  • Smart charging profile — automatically manages current and voltage to protect your battery (details below)
  • Built-in protection — automatic shutdown on overcurrent or overvoltage, with automatic recovery once the fault clears
  • Compact and lightweight — easy to tuck away in a cabinet, under a seat, or wherever your RV's 12V wiring runs

Compatibility:

Designed specifically for the S1 Dry Flush toilet's Li-ion battery pack (3S2P configuration). Output is fixed at 12.6V / 1.5A to match the S1's charging requirements — this is not a universal charger.

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  • 1x DC-DC charger with cigarette lighter input and 5.5 x 2.1mm output cable

This charger is intended for permanent installation, most commonly in an RV or similar vehicle. You have two options:

  1. Cigarette lighter plug — simplest option, ready to use out of the box
  2. Hardwired — cut off the cigarette lighter plug and wire the charger directly into your vehicle's 12–24V DC supply for a cleaner, more permanent setup
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Important Safety Information

  • Keep the charger dry. The output connector is waterproof-compatible and safe to connect to your S1, but the charger housing itself is not waterproof and must be mounted in a dry, protected location — never exposed to rain, spray, or moisture.
  • Disconnect during extended storage. If you're storing your RV for an extended period, we recommend turning off or unplugging the charger to help protect the long-term health of your Li-ion battery.

Specifications
Input DC 12–24V (10–30V range), cigarette lighter plug
Output 12.6V, 1.5A
Output connector 5.5 x 2.1mm DC barrel (waterproof-compatible)
Charging profile CC/CV — see below
LED indicator Red = charging, Green = fully charged
Cable length ~1.5m (charger to S1 connector)
Dimensions 96 x 44 x 28mm
Weight 1 lb (shipping)
Operating temp -20°C to +45°C
Certifications CE, FCC, RoHS
Warranty 2 years
diagram_Cigarette_Lighter_charger_1.png

How It Charges

This charger uses a two-stage constant-current / constant-voltage (CC/CV) charging profile designed to safely and efficiently charge your S1's Li-ion battery:

  • Constant Current (CC) stage: delivers a steady 1.5A charge while the battery voltage is below approximately 12.2V
  • Constant Voltage (CV) stage: once the battery reaches 12.2–12.6V, the charger holds voltage steady and gradually reduces current down to around 350mA as the battery approaches full charge

The LED indicator turns from red to green once this cycle completes, letting you know your battery is fully charged and ready to go.
2-year warranty. Made in China.