Here is another question we receive a lot. Should I take out my battery during the winter months ?
Well, it really does not depend where you are storing it. If it's inside a garage or outside in the dead of winter. I leave my battery in my boat all year round ( outdoors). I also leave it in my snowmobiles ( outdoors ). The key to a prolonged life of a battery is to trickle charge the battery throughout the season. A low amp trickle charger will keep your battery fully charged at all times. The damage occurs when you let the battery die completely and then try to charge it again in the springtime. It does not matter where a battery is stored, as long as it receives a slow trickle charge. If it did matter, then you should take your car battery inside every night before bedtime. The reason your car battery works all winter is because every time you start your car, your alternator tops up your battery amps. Same idea applies with a teardrop trailer. Take it out of the trailer if you want, but if you don't slowly trickle charge it throughout the season it may still end up dead. The fact of the matter is, If you don't charge a battery, it will die. No matter where you store it. Although, "Cold weather makes it more difficult for an already weakened battery to hold its charge, Storing your battery in a garage during spells of cold weather should keep the battery warmer and, easier to charge, but trickle charging will make it last a lot longer. Keeping your battery fully charged means your battery will have a longer lifespan and use energy more efficiently".
More tips can be found at this link here: MTA
Most importantly remember this: It is better for your battery to opt for the slow charging method, because A fast charge increases the potential of overcharging your battery and can create permanent damage.