We used to have a powerboat (two combination starting/deep cycle batteries). We have cars with AGM batteries, motorcycles with SLA, AGM and LiFeP04 batteries, some diesels, and misc yard equipment.

In March 2013 we bought a Clore Charge-It 4512 after having great success with the Clore Jump-N-Carry jump starter. It's under $40 on Amazon.

Smart Chargers | Call us at 1-800-328-2921 | Clore Automotive

This charger has three modes: conventional, AGM, and Gel. Also three max charging rates: 2, 6, and 12 A.

This charger has done a great job at both charging deeply discharged AGM batteries as well as providing a maintenance charge for batteries we can't put on battery tenders. Would buy again.

Good video review.