
Group 27 vs 31 Battery: Size, Fitment, and Which One to Choose
Group 27 vs 31: fitment checks, runtime realities, and when LiFePO4 beats a size upgrade.

Group 27 vs 31: fitment checks, runtime realities, and when LiFePO4 beats a size upgrade.

LiFePO4 guidance on safe discharge, deep discharge risks, and recovery for RV/marine and home energy storage.

A multimeter-based guide to fix RV batteries not charging on shore power—converter, fuses, disconnect, wiring.

Step-by-step multimeter battery test with voltage charts, load checks, charging checks, and troubleshooting.

Ah (amp-hours) is a battery capacity rating—how much current a battery can deliver over time under stated conditions. For the most practical runtime estimates, convert capacity to energy using Wh = V × Ah, then estimate runtime with hours ≈ Wh ÷ W, adjusting for usable DoD and system losses.

Realistic 100Ah trolling motor runtime ranges plus a quick calculator and examples you can copy.

A practical 12V trolling motor runtime guide using usable Ah ÷ average amps, with quick tables, real-world loss checks, and sourcing tips.

Expert comparison of lithium, AGM, and lead-acid trolling motor batteries—performance, charging, cost, and use cases.