Here is a guide on how to understand uBattery to evaluate both battery health and battery behavior based on the information it provides:

1. Evaluating Battery Health

Focus on these two key values:

Design Capacity vs Full Charge Capacity

• Design Capacity → the original capacity when the battery was new
• Full Charge Capacity → the current maximum capacity

How to read it:

• Values close to each other → battery is still healthy
• Large difference → battery has degraded

Simple formula:

Health (%) =
(Full Charge Capacity / Design Capacity) × 100

Example:
30.325 / 32.560 ≈ 93%

Interpretation:

• 90–100% → Excellent
• 80–90% → Good
• 70–80% → Degrading
• <70% → Consider replacement

2. Understanding Real Remaining Energy

Current Capacity

Shows the actual remaining energy, not just a percentage.

Why it matters:

• More accurate than percentage indicators
• Can be used to estimate remaining usage time

3. Understanding Battery Usage Behavior

Discharge Rate (mW / Watts)

This is the most important parameter for behavior analysis.

• Low value → efficient usage
• High value → heavy power consumption

General guideline:

• 3–6 W → idle / very light use
• 7–15 W → normal usage
• 20 W → heavy load (gaming, rendering)

4. Estimating Remaining Runtime

Use:

• Current Capacity (Wh)
• Discharge Rate (W)

Formula:

Time (hours) = Energy (Wh) / Power (W)

This gives a real-world estimate, not a system guess.

5. Understanding Charging Behavior

Charge Rate

Shows how fast the battery is charging.

Interpretation:

• High value → fast charging
• Lower value → battery nearing full or system limiting charge

6. Monitoring Temperature

Why it matters:

Temperature is one of the main factors affecting battery lifespan.

Interpretation:

• <40°C → Safe
• 40–50°C → Warm
• 50°C → Risky

Consistently high temperature accelerates battery wear.

7. Understanding Voltage

Voltage reflects internal battery condition:

• Stable → normal
• Sudden drops → possible battery weakness
• Fluctuations → potential cell imbalance or instability

8. Reading the Graph (Behavior Over Time)

The graph helps visualize real-time behavior:

Normal pattern:

• Smooth, gradual decline → stable usage

Warning signs:

• Sudden drops → battery instability
• Sharp spikes → inconsistent power usage
• Irregular patterns → possible system or battery issues

9. Power Status (Charging vs Discharging)

• A/C Power → connected to charger
• Offline → running on battery

Use this to compare:

• Performance while charging vs not
• How quickly the battery drains

10. Practical Analysis Approach

To properly understand your battery:

A. During Idle

• Check discharge rate
• Should be low and stable

B. During Heavy Use

• Observe power spikes
• Ensure they are within reasonable range

C. While Charging

• Charge rate should decrease near full (this is normal)

D. Observe Trends Over Time

• Is capacity decreasing quickly?
• Is power usage increasing?

11. Signs of a Problematic Battery

Based on uBattery data, warning signs include:

• Rapid health decline
• High discharge rate even when idle
• Unstable graph behavior
• Sudden voltage drops
• Faster-than-normal battery drain
• Frequently high temperatures

Key Takeaway

To understand uBattery effectively:

• Health → check capacity values
• Behavior → monitor discharge rate
• Safety → watch temperature
• Stability → analyze graph and voltage

uBattery stands out because it provides:

• Direct hardware-level data
• No artificial smoothing or estimation
• Accurate insights for technical analysis