can i leave this on my harley all winter ?

I use the Battery Tender® Plus 12V, 1.25 Amp on my motorcycle and the Battery Tender 6V/12V, 4 Amp Lead Acid & Lithium Selectable Battery Charger on my Car. I leave them on both vehicles for extended amounts of time during the cold months.

Can i leave this on while im out of town for a month?

By all means. This device is intended to be connected for continuous operation (except for driving of course - be careful to unhook before getting in your vehicle. The design has a microprocessor that senses battery storage and will adjust the trickle to keep it at 100% (but not overcharging). In fact, you should not disconnect it for any reason unless driving the vehicle. I have a lawn tractor that only receives sporadic use. My zero turn does most of the lawn mowing. In any event, I keep both of these machines on a Deltran dual bank tender. Their batteries are several years old which is unusual for a lawn mower. (Typically, they fail shortly after the 12 Mo warranty.) Leave it on to do its job. Keep in mind that most vehicles (cars & trucks) draw a small amount of amperage while sitting - security system & clock. The tender will compensate for this discharge. Hope this helps.

Does this unit detect cold weather and charge to help prevent battery freezing ?

It does not detect cold weather. If it is on the battery and maintaining the voltage, the battery is less likely to freeze.

will it charge lead acid batteries?

Absolutely, all mine are of that type.

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🔋 Stay Powered, Stay Ahead: The Smart Charger Every Pro Needs

SAFETY FIRST - Spark-proof connection and reverse polarity detection ensure safe, foolproof operation every time.
SMART LED STATUS - Two-color LED indicators keep you informed of charging progress and battery health at a glance.
PLUG PLAY FORGET - Compact, lightweight design with 11 feet of combined cord length for easy, low-maintenance use anywhere.
POWER UP MAINTAIN - Delivers a full 4 AMP charge then seamlessly switches to float mode to keep your battery healthy without overcharging.
UNIVERSAL COMPATIBILITY - Works effortlessly with lithium, lead-acid, AGM, gel, 6V and 12V batteries—one charger for all your vehicles.

The Battery Tender 4 AMP Charger is a smart, versatile battery maintainer designed for 6V and 12V automotive batteries including lithium, AGM, gel, and lead-acid types. It delivers fast charging with automatic float mode to prevent overcharging, features safety mechanisms like spark-proof and reverse polarity detection, and offers convenient LED status indicators. Compact and lightweight with extended cord length, it’s built for easy, reliable use across cars, SUVs, and trucks.

€ 141.50

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Manufacturer	12V
Brand	Battery Tender
Model	12V 022-0209-BT-WH
Item Weight	2.4 pounds
Product Dimensions	6.9 x 3.33 x 1.91 inches
Item model number	022-0209-BT-WH
Exterior	Painted
Manufacturer Part Number	022-0209-BT-WH

Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH

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