Our Landcruiser 80 Series stays parked at home in between trips. It is not a daily runner. Due to this keeping its two batteries (cranking and deep cycle) is crucial so we don't have a battery failure when we are out in the middle of no where. To keep the batteries charged when it is parked we have been using a Noco Genius charger. 

NOCO New Genius GENIUS10 | 6V/12V 10-Amp | Battery Charger + Maintainer + Repair Supply Mode

Brand: ‎NOCO

Features:

• Enter your model number to make sure this fits.
• GENIUS10 - Similar to our G7200, just better. It's 17% smaller and delivers 115% more power. It's the all in one solution battery charger, battery maintainer, trickle charger, plus battery desulfator.
• Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
• Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge.
• Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more.

model number: ‎GENIUS10

Part Number: ‎GENIUS10

Details:

Introducing the all-new GENIUS10, making it one of our the most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS10 is a 6-volt and 12-volt battery charger and battery maintainer rated at 10-amp for all types of lead-acid and lithium-ion batteries, including Flooded, Gel, and AGM, as well as, Marine and Deep-Cycle batteries.

Package Dimensions: 0.4 x 0.9 x 0.4 inches