I know the lithium batteries range in size, but can someone direct me to a brand of charger that’s relatively small in size? I have a tin boat with minimal compartment storage. Any ideas would be a big help. The battery size would be a 50AH or smaller. Thanks in advance.

Walmart battery tender brand, 4amp and made for lithium. Won’t charge fast, but it works and is small. Not all Walmart’s carry it, so you might have to go to more than 1. Size of my hand, which isn’t too big. Sorry about the blurry pic.

Thank you sir!

Many of the lithium sellers also have chargers, most are 10 amps if I remember correctly. Check out the website Drewcraft.com and see what he shows.

You don't want to charge lithium batteries quickly if you don't have to.

small and lightweight, using it right now on my new lithiums.

https://dakotalithium.com/product/dakota-lithium-12v-10a-amp-lifepo4-battery-charger/

Amped Outdoors has these. I use their 3 amp charger which works grear for my 40 amp battery. Mine is the size of a cell phone.
https://ampedoutdoors.com/collections/boat-batteies/products/10a-fast-lithium-charger-lifepo4