Harbor Freight prices › Automotive › Battery Tools Accessories
CEN-TECHitem 59000
0.5 Amp, 12V Automatic Battery Maintainer
Base price$9.99
Members' price$9.99
Everyone else$9.99
Bartlesville, OK shelf$9.99same shelf price as online 1 more store
Benton Harbor, MI shelf$7.99$2.00 under the online shelf price 1 more store
Hold off. A leaked ad has it at $4.98 on Nov 26, $5.01 less than today, good through Nov 30. Not confirmed yet.
Hold off. A leaked ad has it at $4.98 on Nov 23, $5.01 less than today, good through Nov 25. Not confirmed yet.
In-store only. You can't order this one online.
Coming soon
- $4.98 Members: Sale price, starting Mon, Nov 23 through Nov 25, 2026. That's $5.01 under today's $9.99. From a leaked ad, not confirmed by Harbor Freight yet.
- $4.98 Sale price, starting Thu, Nov 26 through Nov 30, 2026. That's $5.01 under today's $9.99. From a leaked ad, not confirmed by Harbor Freight yet.
Announced ahead of time. Harbor Freight changes these now and then, so check on the day.
Price alert
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The numbers
- Today
- $9.99
- Usual price
- $9.99
- 90-day low
- $9.99
- Lowest tracked
- $6.98
- Battery Tender equivalent
- $39.98
- Today, members
- $9.99
- Usual for members
- $9.99
- 90-day low
- $9.99
- Lowest tracked
- $6.98
- Battery Tender equivalent
- $39.98
Apr 14, 2026
Apr 14, 2026
Prices by store
Harbor Freight prices some items differently by store, and once you pick a store its site shows that store's shelf price. These come from contributors who share their store; the main price above is the base price, the one HF shows before you pick a store.
| Store | Today | Usually |
|---|---|---|
| Benton Harbor, MI store 583, checked Oct 17, 2026 | $7.99$2.00 under | $9.99 |
| Bartlesville, OK store 3021, checked Nov 1, 2026 | $9.99 | $9.99 |
Price history
Best price for anyoneInside Track Club priceRegular price
Every price change
| When | Price | Members | Why |
|---|---|---|---|
| Apr 15, 2026 to Oct 29, 2026198 days, checked 3x | $9.99 | Regular price | |
| Apr 14, 20261 day, checked 1x | $6.9830% off | Coupon | |
| Apr 10, 2026 to Apr 13, 20264 days, checked 1x | $6.9830% off | Sale price | |
| Apr 1, 2026 to Apr 9, 20269 days, checked 0x | $6.9830% off | Coupon | |
| Feb 26, 2026 to Mar 31, 202634 days, checked 0x | $9.99 | Regular price | |
| Feb 12, 2026 to Feb 25, 202614 days, checked 0x | $8.0020% off | Coupon | |
| Sep 15, 2025 to Feb 11, 2026150 days, checked 0x | $9.99 | Regular price | |
| Sep 1, 2025 to Sep 14, 202514 days, checked 0x | $8.9910% off | Coupon | |
| Aug 1, 2025 to Aug 31, 202531 days, checked 0x | $9.99 | Regular price | |
| Jul 4, 2025 to Jul 31, 202528 days, checked 0x | $9.99 | $7.99 | Regular price |
| Mar 7, 2025 to Jul 3, 2025119 days, checked 0x | $9.99 | Regular price | |
| Feb 21, 2025 to Mar 6, 202514 days, checked 0x | $6.9930% off | Coupon | |
| Jan 10, 2025 to Feb 20, 202542 days, checked 0x | $9.99 | Regular price | |
| Dec 27, 2024 to Jan 9, 202514 days, checked 0x | $6.9930% off | Coupon | |
| Dec 6, 2024 to Dec 26, 202421 days, checked 0x | $9.99 | Regular price | |
| Dec 5, 20241 day, checked 0x | $6.9830% off | Coupon | |
| Dec 4, 20241 day, checked 1x | $6.9830% off | Coupon | |
| Nov 29, 2024 to Dec 3, 20245 days, checked 1x | $6.9830% off | Sale price | |
| Nov 15, 2024 to Nov 28, 202414 days, checked 0x | $6.9830% off | Coupon | |
| Oct 27, 2024 to Nov 14, 202419 days, checked 0x | $9.99 | $6.98 | Regular price |
| Oct 17, 2024 to Oct 26, 202410 days, checked 0x | $9.99 | Regular price | |
| Oct 15, 2024 to Oct 16, 20242 days, checked 1x | $6.9830% off | Coupon | |
| Oct 12, 2024 to Oct 14, 20243 days, checked 1x | $6.9830% off | Sale price | |
| Oct 10, 2024 to Oct 11, 20242 days, checked 0x | $6.9830% off | Coupon | |
| Sep 26, 2024 to Oct 9, 202414 days, checked 0x | $6.9830% off | Coupon | |
| Sep 9, 2024 to Sep 25, 202417 days, checked 0x | $9.99 | $6.98 | Regular price |
| Sep 1, 2024 to Sep 8, 20248 days, checked 0x | $9.99 | Regular price | |
| Aug 29, 2024 to Aug 31, 20243 days, checked 0x | $8.0020% off | Coupon | |
| Aug 15, 2024 to Aug 28, 202414 days, checked 1x | $7.9920% off | Coupon | |
| Jun 27, 2024 to Aug 14, 202449 days, checked 1x | $8.9910% off | Sale price | |
| Apr 18, 2024 to Jun 26, 202470 days, checked 1x | $9.99 | Regular price | |
| Mar 20, 2024 to Apr 17, 202429 days, checked 1x | $8.9910% off | Sale price | |
| Nov 30, 2023 to Mar 19, 2024111 days, checked 0x | $9.99 | Regular price | |
| Nov 28, 2023 to Nov 29, 20232 days, checked 1x | $7.9920% off | Coupon | |
| Nov 23, 2023 to Nov 27, 20235 days, checked 1x | $7.9920% off | Sale price | |
| Nov 9, 2023 to Nov 22, 202314 days, checked 0x | $7.9920% off | Coupon | |
| Oct 21, 2023 to Nov 8, 202319 days, checked 0x | $9.99 | $7.99 | Regular price |
| Oct 18, 2023 to Oct 20, 20233 days, checked 0x | $9.99 | Regular price | |
| Oct 17, 20231 day, checked 1x | $6.9930% off | Coupon | |
| Oct 13, 2023 to Oct 16, 20234 days, checked 1x | $6.9930% off | Sale price | |
| Oct 11, 2023 to Oct 12, 20232 days, checked 0x | $6.9930% off | Coupon | |
| Sep 27, 2023 to Oct 10, 202314 days, checked 0x | $6.9930% off | Coupon | |
| Sep 10, 2023 to Sep 26, 202317 days, checked 0x | $9.99 | $6.99 | Regular price |
| Aug 31, 2023 to Sep 9, 202310 days, checked 0x | $9.99 | Regular price | |
| Aug 17, 2023 to Aug 30, 202314 days, checked 0x | $8.0020% off | Coupon | |
| Feb 2, 2023 to Aug 16, 2023196 days, checked 1x | $9.99 | Regular price |
Tracking since Oct 16, 2026. Last checked Oct 22, 2026.