Relay™ – Fully-Automatic Battery Charger
SHIPPING INFORMATION
How do I track my order?
You will receive an order confirmation immediately after your purchase. Once your order ships, we'll email you a tracking number so you can follow your delivery.
How long does it take for the order to arrive?
Once shipped, your order should arrive within 3 to 8 business days.
OUR GUARANTEE
Shop With Confidence
If you're not satisfied with your purchase, you may return it within 30 days of receipt.
We want you to feel confident shopping with JStonewell. If something isn't right with your order, our customer support team is here to help.
Keep Your Battery Ready—Without the Guesswork
Dead batteries don’t just slow you down—they stop everything. This fully automatic smart charger and maintainer is built to keep your 6V and 12V batteries charged, protected, and ready whenever you need them.
From daily drivers to seasonal vehicles, it intelligently manages the entire charging process so you can plug in once and let it handle the rest.
Smart 4-Stage Charging System
Designed to charge efficiently without damaging your battery, the system automatically adjusts power through every stage:
- Initialization: Detects battery condition and charge level
- Bulk Charge: Delivers maximum power for faster charging
- Absorption: Slows down to prevent overheating
- Float Mode: Maintains optimal charge without overcharging
Set It and Forget It
Once fully charged, the system automatically switches to maintenance mode. It monitors your battery and recharges it only when needed—no manual intervention required.
Built for Everyday Versatility
Compatible with a wide range of vehicles and battery types, making it a reliable tool for any garage.
- Works with 6V and 12V lead-acid batteries (SLA, AGM, GEL, WET)
- Ideal for cars, motorcycles, ATVs, boats, RVs, lawn mowers, and more
Flexible Connection Options
Designed for both quick access and hard-to-reach batteries:
- Alligator clips for fast, temporary connections
- Fused ring terminal harness for permanent setup
Multi-Level Safety Protection
Engineered to protect both your battery and your equipment during every charge:
- Overcharge protection
- Over-discharge protection
- Over-voltage and over-current protection
- Overheat protection
- Short-circuit protection
- Reverse polarity protection
Simple 3-Step Operation
- Plug into a power source
- Connect to your battery
- Leave it connected or disconnect after charging
What’s Included
- Battery charger and maintainer unit
- Alligator clip connectors
- Fused ring terminal harness
- Instruction manual
Reliable Power, Whenever You Need It
Whether you’re maintaining a daily vehicle or storing one long-term, this charger keeps your battery in peak condition—so you’re never left dealing with a dead start.