Battery Backup Guides
Guides to help you set up reliable battery backup for your devices. Each guide includes runtime calculations, product recommendations, and step-by-step instructions.
How Long Will a Battery Run Your CPAP? Complete Power Guide
Calculate CPAP battery runtime for camping, travel, and emergencies. Compare portable power stations, dedicated CPAP batteries, and DC adapters with real power consumption data.
How to Charge a Laptop from Ryobi, Milwaukee, Makita, or DeWalt Tool Batteries
Build a DIY laptop power bank from your tool batteries for $10-15. USB-C PD charging with overdischarge protection. Perfect for camping, job sites, and emergencies.
How to Power Starlink Mini with Battery - RV, Camping, and Emergency Guide
Simple battery power solutions for Starlink Mini. Direct 12V connection, portable power stations, and vehicle power options with runtime calculations.
How to Power a Router with a Power Bank During Power Outages
How to power a Wi-Fi router during a power outage using a power bank. Simple 12V router power with a USB to 12V cable, no inverter required. Real-world runtime examples.
The 80/20 Battery Rule Explained: What It Really Means for Different Battery Types
Learn how the 80/20 charging rule applies to LiFePO4, lithium-ion, AGM, and lead-acid batteries. Understand Depth of Discharge (DoD) and how it affects battery lifespan and runtime.
LiFePO4 Charging: Do You Need a Special Charger?
Can you charge a LiFePO4 battery with a lead-acid or regular lithium charger? Here's what actually happens and why charger compatibility matters.
How Long Will a 100Ah Battery Last? Complete Runtime Guide
A practical guide explaining how long a 100Ah battery really lasts. Learn how voltage, load, battery chemistry, DoD, and inverter losses affect runtime.
How Long Will a 12V Fridge Run on a 100Ah Battery?
Realistic runtime estimates for running a 12V compressor fridge from a 100Ah battery. Covers duty cycles, temperature factors, and practical tips for camping and off-grid use.
How Long Will a 100Ah Battery Run a 200W Load?
Real-world runtime estimates for a 100Ah battery powering a 200W load. Includes DC vs AC comparison, inverter losses, and a practical calculator.
Sodium-ion batteries: what they are, pros/cons, and where they beat LiFePO4
A practical, no-hype guide to Na-ion batteries: what they are, where they win vs LiFePO4/lithium-ion, and how to compare runtime fairly.
Why don't we use sodium-ion batteries everywhere? The real disadvantages
If Na-ion is promising, why isn't it everywhere already? The practical drawbacks: energy density, ecosystem maturity, and real-world product constraints.
Sodium-ion vs lithium: what's better and when
A no-hype comparison of Na-ion vs lithium-based batteries (LiFePO4 and typical Li-ion): energy density, cold performance, lifespan, and cost.
Na-ion in real life: lifespan, cold weather, and cost reality
Practical answers to the top Na-ion questions: how long they last, what cold does to runtime, and how to think about $/kWh without getting misled.