Overview
It is normal for iPhone batteries to lose capacity over time — Apple's lithium-ion batteries are rated for around 500 full charge cycles before capacity drops noticeably. But when your iPhone goes from 100% to dead within a few hours, or drops 20% in the time it takes to commute to work, the battery is either severely degraded or something else is draining it aggressively. This guide walks through both scenarios.
Common Causes
- Battery health below 80%, reducing the actual charge capacity the battery can hold
- Background App Refresh enabled for many apps consuming CPU and radio resources
- Location services enabled for apps that do not need constant GPS access
- Push email and notifications waking the device frequently throughout the day
- iOS software bugs in a recent update causing abnormal CPU usage
- A rogue app stuck in a crash loop consuming excessive battery in the background
Signs & Symptoms
- iPhone drops from full charge to below 20% within three to four hours of light use
- Battery percentage jumps or drops erratically rather than declining steadily
- Phone becomes warm even when not being actively used
- Battery Health in Settings shows below 80% maximum capacity
- Screen-off standby time is dramatically shorter than when the phone was new
Should You Try DIY?
Attempting to replace iPhone batteries without proper tools and training can cause permanent damage. iPhone batteries are adhered with strong adhesive strips and puncturing the battery can cause a fire. Always consult a professional technician.
Professional Solution
iTech Repairs replaces iPhone batteries using quality cells that match or exceed original specifications, removed and installed with proper tools to avoid puncture risk. We also run a software diagnostic to rule out any app or iOS issue contributing to the drain. Battery replacements typically take 15 minutes and are backed by our lifetime warranty.
How Much Does It Cost?
Most iPhone battery replacement repairs at iTech Repairs start from $79. Call us or walk in for a free diagnostic.
Repair vs Replace
If your iPhone is more than 5 years old and the repair cost exceeds 50% of the device's value, replacement may be worth considering. Our technicians can advise you after a free diagnostic.
Why Choose iTech Repairs?
iTech Repairs in Braybrook and Spotswood offers walk-in battery replacement service with no appointment needed. Cheapest price guaranteed, lifetime warranty on all repairs, 15-minute on-the-spot service where possible.
Frequently Asked Questions
- Why is my iPhone battery draining so fast?
- Battery drain accelerates when battery health drops below 80%, background apps consume excessive power, location services run constantly, or there is a software bug in the current iOS version.
- How do I check my iPhone battery health?
- Go to Settings > Battery > Battery Health & Charging. If health is below 80%, Apple and iTech Repairs recommend battery replacement to restore full capacity.
- How much does iPhone battery replacement cost in Melbourne?
- iPhone battery replacement at iTech Repairs starts from $79. Walk in for a free diagnostic — we confirm the battery health before quoting.
- How long will a new iPhone battery last?
- A new quality battery typically provides a full day of normal use. Battery capacity naturally declines over charge cycles — around 500 full cycles before it drops noticeably below original capacity.