Save money. Stay powered.
Be prepared.
Compare home battery storage and portable power stations, calculate emergency backup runtime, prepare for power cuts and learn how to reduce electricity bills.
Save money on electricity
Compare storage prices, capacity and costs per kWh. Explore off-peak charging and solar.
Compare batteriesPower cut preparedness
Find out how long a backup battery could run your fridge, lights, router and other essentials.
Plan your backupBattery and device finder
Which battery do you need?
Search the live eBattery reference database. Select a match to see its detailed guide, suitable devices and Amazon options.
Check your device's required chemistry and voltage before buying. We only show a direct Amazon product card when its listing has been verified; otherwise we provide a labelled Amazon search link.
Explore eBattery
One place for every kind of battery
We're building a connected reference library, designed to make useful information easier to find.
Interactive tools
Could a home battery save you money?
Explore a simple illustration of the value of moving electricity from a cheaper charging period to a higher-priced usage period.
Adjust your own electricity rates
Set battery capacity and daily usage
See an illustrative gross annual saving
Home battery calculator
Illustrative tariff-shifting estimate
Illustrative gross annual tariff saving
Based on 8.0 kWh shifted per cycle, 300 cycles/year and a 17p/kWh rate difference.
Simplified estimate only: assumes 90% usable capacity and does not model round-trip efficiency, fixed charges, degradation, installation cost, export payments, solar generation or tariff restrictions. It is not a payback or purchasing forecast.
What's next in energy?
Tomorrow's batteries are being developed today.
Follow the principles, trade-offs and progress of solid-state, sodium-ion, lithium-sulfur, silicon-anode, flow and iron-air systems. We'll distinguish laboratory results from commercial availability.
A better battery resource starts here.
Our database, comparisons and independent guides will grow in stages.