Does battery charger have a safety feature to prevent constant charging overheating of already bad batteries if the voltage stays low?

This lead-acid charger will not turn off automatically when it is fully charged, but will enter the final stage of floating charge, and charge with a small current trickle to keep the battery fully charged and will not overheating and overcharge.

How can I get it out of 6v and into 12v mode? It doesn't change automatically.

Sounds like it may be defective. If the leads are connected to a 12V battery, and power lead to-110v, it should sense that and go to 12V mode. If your battery is completely dead, perhaps there isn’t enough voltage for it to detect? Try a hot batt. Maybe? If it still stays on 6V then it is indeed defective. Hope this is of some help.

Only light on is the mode led =6v. Battery is new but installed and sitting over a year. Will it eventually charge if under the 3v?

Sorry to say I have only trickle charged as Low as 6 volt. ie (lawnmower and Quad batteries). But a trickle charge is just that. Very very small charge to enlighten power in the battery for long term winter storage in my case. If the battery still has life in the cells I believe it should take a charge. If you hook up the T- Charger and the battery is bad it will tell you NG. When my mower battery went bad it would knock off and red light to signal no charge.

What will be the maximum voltage on a 12v lead acid battery before it cycles off and at what voltage will the unit cycle back on?

My agm 12 volt will increase to 13.4 volts which is normal for it when full. Then goes into maintenance. Very few 12 volt batteries are exactly 12 volts. Nost are between 12-14 when at capacity. No danger.

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Charge Smart, Live Smart! ⚡

⏳ 72 HOUR TIMER - Automatic switch to float mode to prevent overcharging.
🔒 SAFETY FIRST - Multiple protection mechanisms ensure safe operation.
🧳 PORTABLE DESIGN - Lightweight and easy to carry for on-the-go charging.
🔌 SMART COMPATIBILITY - Compatible with a wide range of vehicles and battery types.
💡 LED STATUS INDICATOR - Intuitive feedback on charging and maintenance status.

The 6V/12V Battery Charger is a versatile and intelligent charging solution designed for lead-acid batteries. With a compact design, it features a 5-stage automatic charging process, multiple safety protections, and compatibility with various vehicles, making it an essential tool for any vehicle owner.

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Item Weight	0.2 Kilograms
Item Dimensions D x W x H	3.1"D x 5.1"W x 3"H
Color	6/12V 1.5A
Energy Specifications Met	sae
Battery Charge Time	24 Hours
Current Rating	1.5 Amps
Input Voltage	240 Volts
Output Voltage	12 Volts

6V 12V Battery Charger 1.5A Automatic Battery maintainer trickle Battery Charger Smart Float Charger for auto car Motorcycle Lawn Mower Boat Motorcycle Snowmobile

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