Harbor Freight prices › Generators & Engines › Generator Accessories
THUNDERBOLT SOLARitem 56770
12V, 35 Ah Sealed Lead-Acid Battery
Base price$79.99
Members' price$79.99
Everyone else$79.99
Benton Harbor, MI shelf$79.99same shelf price as online 1 more store
Bartlesville, OK shelf$79.99same shelf price as online 1 more store
$79.99 is its normal shelf price; a 25% coupon to $59.99 just ended on Oct 25.
$79.99 is about its normal price.
Why it's Fair
The record shows only two coupon dips, 25% off each time: $57.99 in late March to mid April 2025 and $59.99 from mid to late October 2026. That's two sales about 18 months apart, which isn't a rhythm. The last one ended five days ago, and sale_odds put a better price within six weeks at only about 4%. Nothing is announced, but coupons here have started with little warning, so if you can hold off, a return to around $60 is possible, just not likely soon.
Next sale, maybe: No telling when, around $60. A long shot.
Written by AI from this item's price record and coupons. The prices on this page are the record itself.
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The numbers
- Today
- $79.99
- Usual price
- $79.99
- 90-day low
- $59.99
- Lowest tracked
- $57.99
- Interstate Batteries equivalent
- $93.01
- Today, members
- $79.99
- Usual for members
- $79.99
- 90-day low
- $59.99
- Lowest tracked
- $57.99
- Interstate Batteries equivalent
- $93.01
Apr 11, 2025
Apr 2, 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 |
|---|---|---|
| Bartlesville, OK store 3021, checked Oct 21, 2026 | $79.99 | $79.99 |
| Benton Harbor, MI store 583, checked Oct 20, 2026 | $79.99 | $79.99 |
Price history
Best price for anyoneInside Track Club priceRegular price
Every price change
| When | Price | Members | Why |
|---|---|---|---|
| Nov 2, 2026 to Nov 5, 20264 days, checked 1x | $79.99 | Regular price | |
| Oct 30, 2026 to Nov 1, 20263 days, checked 0x | $67.9915% off | 15% off any single item (one item a day) | |
| Oct 29, 20261 day, checked 0x | $79.99 | $67.99 | Regular price |
| Oct 26, 2026 to Oct 28, 20263 days, checked 1x | $79.99 | Regular price | |
| Oct 16, 2026 to Oct 25, 202610 days, checked 5x | $59.9925% off | Scan coupon 78965533 | |
| Apr 3, 2026 to Oct 15, 2026196 days, checked 0x | $79.99 | Regular price | |
| Mar 6, 2026 to Apr 2, 202628 days, checked 0x | $79.99 | $57.99 | Regular price |
| Nov 14, 2025 to Mar 5, 2026112 days, checked 1x | $79.99 | Regular price | |
| Aug 29, 2025 to Nov 13, 202577 days, checked 0x | $76.99 | Regular price | |
| Aug 1, 2025 to Aug 28, 202528 days, checked 0x | $76.99 | $59.99 | Regular price |
| Apr 12, 2025 to Jul 31, 2025111 days, checked 0x | $76.99 | Regular price | |
| Mar 29, 2025 to Apr 11, 202514 days, checked 0x | $57.9925% off | Coupon | |
| Oct 28, 2024 to Mar 28, 2025152 days, checked 0x | $76.99 | Regular price | |
| Sep 30, 2024 to Oct 27, 202428 days, checked 0x | $76.99 | $59.99 | Regular price |
| Oct 1, 2023 to Sep 29, 2024365 days, checked 0x | $76.99 | Regular price | |
| Sep 3, 2023 to Sep 30, 202328 days, checked 0x | $76.99 | $64.99 | Regular price |
| Sep 1, 2023 to Sep 2, 20232 days, checked 1x | $76.99 | Regular price | |
| May 27, 2023 to Aug 31, 202397 days, checked 1x | $79.99 | Regular price | |
| Dec 3, 2022 to May 26, 2023175 days, checked 1x | $74.99 | Regular price | |
| Nov 5, 2022 to Dec 2, 202228 days, checked 0x | $74.99 | $64.99 | Regular price |
| Sep 24, 2022 to Nov 4, 202242 days, checked 0x | $74.99 | Regular price | |
| Aug 27, 2022 to Sep 23, 202228 days, checked 0x | $74.99 | $64.99 | Regular price |
| Jun 25, 2022 to Aug 26, 202263 days, checked 0x | $74.99 | Regular price | |
| May 28, 2022 to Jun 24, 202228 days, checked 0x | $74.99 | $59.99 | Regular price |
Tracking since Oct 17, 2026. Last checked Nov 5, 2026.