03battery love
Battery Health & Degradation Log
Track State of Health every month, keep the 80% habit and log every software update.
- Page
- 4
- Zones
- 4
- Fields
- 10
Purpose
Batteries age slowly and quietly. A monthly State of Health reading, plotted on a simple chart, shows the real trend, while the charge habit notes and the update log explain what changed and when.
Layout zones & field markers
Zone 1 · Top left card
Baseline
- Number box
Original capacity
kWh when new
- Number box
Original range
mi at 100%
- Write-in line
Baseline date
- Chip select
Chemistry: LFP, NMC, NCA, NiMH
NiMH covers many classic hybrids
- Formula strip
State of Health formula
Zone 2 · Top right card
80% charge habits
- Checkbox
Four healthy charging tips
- Habit tracker
Stayed in 20 to 80% today
31 numbered day circles
Zone 3 · Middle, full width
Monthly State of Health
- Log table
Reading date, range at 100%, usable kWh, SoH %
One column per month, January to December
- Chart
SoH line chart from 100% to 70%
Aligned under the month columns
Zone 4 · Bottom, full width
Software & firmware updates
- Log table
Date, version, what changed, range or feel after
4 rows in US Letter, 5 in tablet, 6 in A4
Formulas printed on the page
- State of Health
- usable kWh today ÷ original kWh × 100
- Range check (estimate)
- range at 100% today ÷ original range × 100
Design notes
- The month table and the chart share one 12-column grid, so each reading sits right above its plot point.
- The chart floor is 70%, the capacity many EV battery warranties guarantee.
- Numbered habit circles turn the 80% rule into a cute daily streak.
Battery Health & Degradation Log
SoH % = kWh today ÷ original kWh × 100
- Daily driving: keep it between 20% and 80%.
- Road trip: charge to 90 to 100% just before you leave.
- LFP pack: many makers suggest a full charge about once a week. Check your manual.
- Try not to park for days at 100% or below 10%.
Plot a dot each month and join them. 70% is the floor many battery warranties guarantee.