PEV Battery Range & Voltage Calculator

Estimate real-world electric scooter and e-bike range, calculate watt-hours (Wh), and look up critical multimeter test voltages across 24V, 36V, 48V, 52V, 60V, and 72V lithium battery packs.

Battery & Vehicle Parameters

Input Config

1. Nominal Pack Voltage

2. Pack Capacity (Amp-Hours / Ah)12.8 Ah

3. Vehicle Type & Riding Mode

Rider Weight75 kg / 165 lbs

Terrain Profile

Charger Output Rating (Amps)2 Amps

Calculated Performance

Estimated Real Range

28 km

(~17 miles)

Total Battery Energy

461 Wh

415 Wh usable

Avg Energy Consumption:15.0 Wh / km

0-100% Charge Time (2A):~7.4 hours

Critical Multimeter Voltage Thresholds10S Li-Ion

100% Full42 V4.20V / cell

Nominal36.0 V3.60V / cell

Storage (50%)38 V3.80V / cell

BMS Cutoff30 V3.00V / cell

Technician Tip: Never store your lithium battery at 100% full charge or below 20% for more than 2 weeks. Aim for the storage voltage of 38V to prevent dendrite growth and capacity degradation.

36V (10S Li-ion - Xiaomi/Ninebot)— State of Charge (SoC) Chart

Cross-reference resting voltage with your digital multimeter to verify real battery capacity.

How to Test with Multimeter →

Battery Level (%)	Pack Voltage (Resting)	Average Cell Voltage	Status / Health
100%	42 V	4.20 V / cell	Fully Charged
90%	41 V	4.10 V / cell	Fully Charged
80%	40.2 V	4.02 V / cell	Nominal Operation
70%	39.2 V	3.92 V / cell	Nominal Operation
60%	38.4 V	3.84 V / cell	Optimal Storage Zone
50%	37.8 V	3.78 V / cell	Optimal Storage Zone
40%	37.2 V	3.72 V / cell	Optimal Storage Zone
30%	36.5 V	3.65 V / cell	Nominal Operation
20%	35.5 V	3.55 V / cell	Recharge Immediately
10%	34 V	3.40 V / cell	Recharge Immediately
0%	30 V	3.00 V / cell	Recharge Immediately

How E-Bike and E-Scooter Battery Calculations Work

Understanding battery chemistry and voltage thresholds is fundamental to diagnosing micro-mobility range issues, BMS shutdowns, and degraded lithium-ion cells.

Watt-Hours Formula

Energy capacity in Watt-Hours (Wh) is calculated as:

Wh = Nominal Voltage (V) × Capacity (Ah)

A 36V 12.8Ah pack holds 460.8 Wh of total chemical energy.

Voltage Sag Under Load

When full throttle is applied during steep hill climbs, battery voltage temporarily sags by 1.5V to 3.5V due to cell internal resistance. If voltage dips below BMS cutoff, the vehicle cuts power.

Prolonging Battery Life

Charging only to 80% (approx 4.05V/cell) and avoiding discharge below 20% can increase cycle life from 500 cycles to over 1,200 full charge cycles.