This is a great battery charger. It has advanced features like temperature compensation. It charges any type of battery and can maintain any type of battery. The included temperature probe lets you monitor the temperature inside the battery.
No charger is easy to use or deliver precise charging, but all of the chargers we tried were questionable with temperature control. The CTEK MXS 5.0 is our preferred, and easy-to-understand, choice.
Schumacher SP1297 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator
This Schumacher battery maintainer offers a lot of features to fit in your budget, and does a good job of charging and maintaining your battery. You pay a little extra for the three-year warranty, but it's worth it.
TowerTop 2/8/15A 12V Smart Battery Charger/Maintainer Fully Automatic with Winter Mode
This battery charger has memory and maintains your battery at the full charge level. Smart battery rating, pre-selection of charging mode, microprocessor controlled.
Solar Clore Automotive PL2320 20-Amp Fully-Automatic Smart Charger
A smart charger that safely maintains and charges your battery, marketers claim. However, its temperature compensation feature leaves something to be desired.
Schumacher SC1359 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator with Battery Detection
NEXPEAK 10-Amp Car Battery Charger
This charger is really tiny, which is great if you want to store it in a drawer. It even monitors the charging temperature and protects against overcharge.
Interstate Batteries Automatic Battery Charger 12V 1.0 Amp (SLA/AGM) Sealed Lead Acid Trickle Charger Maintainer (920005)
This versatile charger maintains a car battery, a lawn mower battery, and a generator battery at full charge. But the charger is bulky and difficult to use.
ABLY Car Battery Charger 12V/8A 24V/4A Automatic Smart Battery Charger/Maintainer with LCD Display Pulse Repair Charger Pack for Car
The ABLY charger is a sophisticated tool with an intelligent CPU, and can do far more than simple trickle charging. It's perfect for a stable startup.
Schumacher SC1361 Fully Automatic Battery Charger, Maintainer, and Starter – 50 Amp/10 Amp, 12V
These smart, fully automatic battery maintainers were easy to use and reliable to charge a set of cars. They also made a great addition for starting or charging motorcycles, boats, golf carts, and more.