Get the full price history and find the best time to buy.
The lowest price we've tracked for Philips 9v Lithium Battery 9volt Batteries Smoke Detector 4 Pack 1200mah in the last 90 days is $28.49 (Aug 28, 2026).
Today's price of $33.99 is 19% above the 90-day low.
We've recorded 2 price drops across 50 price checks since Jun 7, 2026; the average price over that period is $34.58.
| Date | Source | Price |
|---|---|---|
| Sep 1, 2026 | Amazon | $33.99 |
| Aug 28, 2026 | Amazon | $28.49 |
| Aug 15, 2026 | Amazon | $34.99 |
| Aug 6, 2026 | Amazon | $33.99 |
| Jun 7, 2026 | Amazon | $34.99 |