Battery Life Calculator

Results

Battery Type Comparison

How Battery Costs Add Up

Formula: Annual Cost = (12 / Battery Life Months) × Battery Count × Cost per Battery

Example: A lock with 6-month battery life using 4 AA batteries ($1.00 each):
(12 / 6) × 4 × $1.00 = $8.00 per year

Battery Life Factors:

• WiFi locks use more power than Bluetooth (3-6 months vs 6-12 months)
• Frequent usage reduces battery life
• Extreme temperatures affect performance
• Remote access features drain batteries faster

Pro Tip: Lithium batteries last 2-3× longer than alkaline but cost more upfront. Calculate if the longer life justifies the higher cost for your usage pattern.