Laptop, phone, UPS, power-bank and portable power-station users
Charging & Backup Power Planner
Plan charger wattage, battery energy, backup runtime and required battery size from documented device ratings without pretending the browser can read charging protocols or battery health.
Open each test in a new tab, then record what you observed here. Your progress is saved locally in this browser.
1
Charger wattage matchCompare a device's entered power requirement with a charger's rated wattage while keeping USB-PD/PPS and voltage-profile limits explicit.
2
Voltage × currentCalculate watts from an entered USB or charger voltage/current profile.
3
Battery runtimeEstimate runtime from battery watt-hours, average load and conversion efficiency.
4
Required battery energyEstimate the battery energy needed to run an average load for a target number of hours.
5
Charge-time estimateEstimate battery charging time from energy capacity, charger power and entered charging efficiency.
6
Power-bank charge estimateEstimate how many full-equivalent device charges a power bank can provide from entered Wh values and conversion efficiency.
0 passed0 need attention0 skipped