A standard lead-acid car battery is a small, very dense box near 12 × 9 × 10 inches at 40–55 lb. It ships as a regulated wet/sealed hazardous item — the weight and the hazmat handling, not the size, drive both cost and how it can travel. What you'd actually pay comes down to your own lane, the speed you pick, and the finished box on the scale, so price those numbers rather than a guess.
Every figure here comes from a single real rate pull: a 12 × 10 × 12 in box at 41 lb, which UPS Ground priced at $66.91 on the lane described below.
Here's an unedited pull from 2026-07-24. We gave the SMKlog calculator the phrase “Group 35 AGM car battery, 12V 650 CCA” plus a Manchester, NH 03101 to Boise, ID 83702 route, and copied its output straight onto this page. Nobody weighed or measured anything; the tool worked from the description alone.
Group 35 AGM car battery, 12V 650 CCA
Naming the group size and chemistry is what pinned the estimate down. Type just “battery” and the tool has to reach for a category-wide average; spell out Group 35 AGM and it can size the actual unit.
12 × 10 × 12 in
30 × 25 × 30 cm
Packed weight 41 lb (18.5 kg).
Manchester, NH 03101
to Boise, ID 83702
These are two genuine ZIP codes rated at request time. Swap in a shorter lane and the numbers drop; nothing else on this page shifts the total as hard as the zone does.
Run the size math and you get roughly 10.4 lb of dimensional weight (12 × 10 × 12 ÷ 139), which the real 41 lb crushes. A battery is about as dense as parcels get, so every rate in this table is billed off the scale reading, and only a wildly oversized carton could change that.
| Carrier | Service | Price | Estimated transit |
|---|---|---|---|
| UPS | Ground | $66.91 | 8-9 business days |
| FedEx | Ground | $94.34 | 8-9 business days |
| USPS | Ground Advantage | $138.57 | 5-6 business days |
Each figure is the checkout total: the carrier label and SMKlog's charge together, with nothing tacked on afterwards. UPS Ground won this particular run at $66.91. Take the table as one dated snapshot rather than a menu — carrier tariffs shift week to week and a different battery lane rates differently, so punch in your own two ZIPs for a current figure.
About 12 × 9 × 10 in once boxed. Ship only in an approved battery box with the terminals capped and the whole unit sealed so acid can't escape. AGM and sealed batteries ship more easily than flooded ones, which many carriers restrict.
40–55 lb packed. Whichever is higher, scale weight or the dimensional figure, is what you're billed for, so put the finished carton on a scale rather than trusting the spec sheet.
For a battery: how far it goes, how fast you want it there, and what the packed box weighs. Manchester, NH to Boise, ID spans nearly the whole country; the identical box to a neighbouring state would rate well under these figures. Even on this one run the spread was $66.91 to $138.57 across three carriers. A single flat number for “shipping a car battery” would be fiction — the honest answer is a live quote on your route.
Plan around 12 × 9 × 10 in packed. Ship only in an approved battery box with the terminals capped and the whole unit sealed so acid can't escape. AGM and sealed batteries ship more easily than flooded ones, which many carriers restrict.
Typically 40–55 lb packed. You pay on whichever is larger, the scale reading or length × width × height over the carrier's divisor, and a lowballed weight usually resurfaces as a billing adjustment after delivery. Weigh the sealed box before you quote it.
Only sealed or AGM types, and only with the terminals protected and the battery boxed to contain leaks; they're classed as regulated goods. Flooded, non-sealed batteries are restricted or banned by most parcel carriers.
It weighs 40–50 lb, so it prices as a heavy parcel, and the hazmat classification adds a handling fee on top. Distance matters, but the weight and regulatory surcharge dominate the quote.
Weight and restrictions. At about 45 lb in a 12x9x10 inch box, a car battery bills on its actual weight — the box is too small for size-based pricing to matter. The bigger factor: lead-acid batteries are restricted goods, so they generally move by ground with carrier-compliant packing, which narrows your options and adds cost. To see what your own lane costs, run the exact route and packed size through the SMKlog calculator and compare current USPS, UPS, and FedEx pricing.
Ground — it's effectively the only lane. Sealed nonspillable batteries (AGM, gel) can travel with UPS or FedEx ground services when packed and labeled to the carrier's battery rules; flooded lead-acid batteries are far more restricted, and USPS won't take them. Since it's a dense 45 lb package, heavier-box economics favor UPS and FedEx anyway. Compare ground options and skip air entirely — it's both costly and generally off-limits.