Garmin Forerunner 645 Battery Replacement
Complete guide to Garmin Forerunner 645 battery replacement. Cost estimates, difficulty level, time required, and environmental impact.
🌍 Share Your Environmental Impact
Inspire others to repair instead of replace! Share how much CO₂ you're saving.
💰 Cost Breakdown
💡 Tip: Costs vary by location and repair shop. Authorized service centers typically charge more than independent repair shops.
🔧 Repair Overview
Battery Replacement is one of the most common repairs for Garmin Forerunner 645. This repair involves replacing the damaged power component with a new or refurbished part. The process typically takes 30 min - 1 hour and requires moderate skill level.
🔧 Required Tools
🔩 Replacement Parts
What You'll Need
- Replacement power part (OEM or aftermarket)
- Precision screwdriver set (Phillips #000 or pentalobe)
- Opening tools (plastic spudger, suction cup)
- Adhesive strips or glue
- Clean workspace with good lighting
Step-by-Step Process
Step 1:
Use the ''Torx 5 Screwdriver'' to remove all four 1.1 mm screws on the back of the watch.
Step 2:
Place the watch upside down and lift the back panel from the watch.
Remove the battery housing from the watch.
Place the housing face up to ensure that the two springs do not fall out.
Some have noted that certain features of the watch do not work if the springs are mixed up. Be sure they stay in place.
Step 3:
Secure the two springs with two small pieces of scotch tape to ensure the springs do not fall out.
Step 4:
Remove the 8 metal latches from the black battery housing.
Gently bend the 8 metal latches slightly away from the black battery housing.
Step 5:
'''DO NOT''' directly touch the circuit board on the motherboard of the watch. This will render your watch inoperable.
Grab the motherboard from its sides and set it aside in a safe place.
Step 6:
Separate the clear tape attached to the battery.
Be gentle! You will be reusing this tape for the new battery.
Step 7:
Prepare your new battery.
Secure the battery under the tape.
The + sign should face ++away++ from the tape.
📖 Repair guide provided by iFixit - The free repair manual. Licensed under CC BY-NC-SA 3.0.
iFixit Difficulty: Moderate | Time: NaNh NaNm
DIY vs Professional Repair
✋ DIY Repair
- ✅ Lower cost (parts only: $30-$120)
- ✅ Learn new skills
- ❌ Risk of further damage
- ❌ No warranty
- ❌ Requires tools and time
🔧 Professional Repair
- ✅ Expert installation
- ✅ Warranty included
- ✅ Faster turnaround
- ❌ Higher cost ($50-$200)
- ❌ Need to find reputable shop
Environmental Impact
By choosing to repair your Garmin Forerunner 645 instead of replacing it, you're preventing approximately 29 kg of CO₂ emissions. Manufacturing a new Garmin Forerunner 645 generates 34 kg of CO₂, while this repair only produces about 5 kg of CO₂. That's a 85% reduction in carbon emissions!
Get a Personalized Repair Estimate
Upload a photo of your Garmin Forerunner 645 and get an AI-powered cost estimate in seconds. See exactly what's damaged and how much it'll cost to fix.