5 Signs Your Phone or Laptop Needs a New Battery

# 5 Signs Your Phone or Laptop Needs a New Battery Batteries are the single most common failure point on modern devices — not because they're fragile, but because they're consumable. Every full charge-discharge cycle wears the cells down a fraction of a percent. After 400–500 cycles, you notice. Here are the five symptoms we see every day at 440 Repair. ## 1. The battery drops 20–30% at once You were at 50%. You check back after a 10-minute call and you're at 25%. The battery isn't actually empty — it's **miscalibrated** because worn cells can't hold their voltage under load. This is the #1 tell. It almost always means battery replacement. ## 2. Your device dies before reaching 0% Phone shows 15%, immediately shuts off. Laptop shuts down at 30%. Batteries have a minimum safe voltage. When the cells can't maintain it under load, the OS force-shuts to protect the hardware. Replacing the battery restores the full usable range. ## 3. The case is bulging Look at the back of your phone or laptop. Is it starting to curve? Feel a bump under the trackpad? **Stop using it.** A swollen battery is a lithium fire waiting for an excuse. Bring it in immediately — we'll swap it same-day and dispose of the old one properly. Never attempt this yourself. Swollen batteries are volatile. ## 4. It gets hot, especially during charging Warm is normal. **Hot-enough-that-you-notice** is not. Heat usually means the battery is struggling to accept a charge, which accelerates the decline and risks damaging adjacent components. Check your charger first — a bad cable can also cause heat. If it persists with a known-good charger, the battery is the suspect. ## 5. Battery health is below 80% (iOS / macOS shows this natively) - **iPhone:** Settings → Battery → Battery Health & Charging → Maximum Capacity - **MacBook:** Apple Menu → System Settings → Battery → Battery Health Under 80% is Apple's threshold for a recommended replacement. You'll notice it long before the phone stops working. Android phones don't expose this number as readily, but apps like AccuBattery track it reasonably well over a few weeks. --- ## Why not just replace the phone? - A phone battery swap is **$49–$79** at 440 Repair. Same day. - A new phone is **$600–$1,200** and a weekend of setup. - The environmental math isn't close — one replaced battery vs. mining a whole new device. Unless your phone has other serious issues, a battery swap is the obvious move. --- *Suspect your battery? [Request a free diagnostic](/quote). If we recommend a replacement, you'll have a quote within a day.*