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Bunton BZT-3310 Full Throttle FT438-U1 Battery
Fullriver- Volts 12V
- Capacity 35 Ah
- Group U1
- Terminals M6 + TP26
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Fullriver Full Throttle Series
Bunton BZT-3310 Replacement Battery - Full Throttle FT438-U1 12V
Product Specifications
Bunton BZT-3310
The Full Throttle FT438-U1 is the replacement battery for the Bunton BZT-3310. The FT438-U1 is a 12V Full Throttle high-performance AGM battery that delivers 438 CCA of cold cranking power, with high-compression cells in a heavy-duty case built to take shock and vibration.
Fits the 1999–2004 Bunton BZT-3310.
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Cranking power first. Rated 438 CCA to fire engines in demanding conditions, backed by a listed reserve capacity.
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Sealed, no upkeep. AGM construction holds the acid in glass mat, so there is nothing to top off and nothing to spill.
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Built for rough use. High-compression cells and a heavy-duty case withstand shock and vibration off-road and on the job.
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Full specifications for this battery, ready to print or send on.
Shipping & Returns
When will my order ship?
In-stock orders ship same day if ordered before 10am CST on a business day, with tracking on every order.
Is shipping free?
Items with the Free Shipping badge ship free. Everything else ships at our set rate for that item, based on how many you order or how much it weighs, and you'll see it at checkout before you pay.
How will it ship?
Most orders ship UPS. Orders over 700 lbs, or with any single item over 70 lbs, ship LTL freight on a pallet. Transit is 2 to 5 days on average.
What if my batteries are damaged in transit?
Contact us within 48 hours of delivery and we'll start the damage claim and ship a replacement immediately.
Do you ship outside the continental US?
Not through the website. Call us and we'll see what we can do.
How do I return something?
Contact us within 30 days of receiving your order and we'll send a return authorization. Items must come back new and unused; reuse the original packaging so the battery arrives back safely.
I received the wrong batteries, now what?
Contact us within 30 days and we'll ship the correct batteries free of charge and cover return shipping on the mistake.
Who pays for return shipping?
We do if it's our mistake, such as a wrong or defective item. Otherwise return shipping is yours: send it back with your own carrier, or we can provide a label and deduct its cost from your refund.
How long does a refund take?
Usually within four weeks of handing your return to the carrier, and often sooner. Shipping charges aren't refunded.
Same cart, same pack
Other brands that fit
The same set in every brand we carry. Same fit, different capacity, warranty and price.


About the manufacturer
Fullriver: the makers of Full Throttle
Fullriver Battery has built sealed lead-acid batteries since 1995 and controls the whole manufacturing process: grid casting, plate pasting and final assembly are all done at its own award-winning facility. It makes a range of 2, 6, 8 and 12-volt batteries in BCI, DIN and international sizes, including the DC Series deep-cycle line and the Full Throttle line. Full Throttle is Fullriver’s own high-performance AGM line, not a separate company.
The technology
Thin Plate Pure Lead (TPPL) AGM
Full Throttle was designed from the ground up for the growing demands of today’s vehicles. High-compression cells in a heavy-duty case stand up to shock and vibration, while pure-lead cells and thin-plate AGM technology deliver reliable power, again and again.
Starts the engine, runs the gear
Fullriver calls Full Throttle a dual-purpose battery: it starts an engine and handles some cycling, running equipment with the engine off. Its heavily tinned grids take light-duty cycling like winching, navigation, lighting and air systems.
- Not for golf carts: for pure cycling, where the batteries are the only power source, Fullriver points you to its DC or EGL Series.
- UTV tip: the stator charges poorly with accessories running, so after every outing charge on a 3–4 stage, 10–15 A AGM charger (not a tender).
- Parked for a while? Disconnect the negative cable to stop parasitic drain.
- Mount upright or on any side, never upside down.
Is Full Throttle right for you?
Choose Full Throttle if…
Full Throttle at work
Built for how you use it
Powersports, UTV & motorcycle
Full Throttle covers powersports from a tiny BTX9 up, and Fullriver’s UTV sheet splits them into pure sport and multi-purpose / dual sport picks.
- High compression and OTP welds for bumpy trails.
- Charge after every ride: use a 3–4 stage, 10–15 A AGM charger, since the stator struggles with accessories running.
- Zero-spill for creative mounting, with no corrosion or dangerous gassing.
| Model | Volts | Group | 20-hr | Weight |
|---|---|---|---|---|
| FT100 | 12V | BTR9-BS | 8 Ah | 6.6 lb |
| FT185 | 12V | BTX15L | 14 Ah | 10.8 lb |
| FT200 | 12V | BTX20L-BS | 14 Ah | 13.2 lb |
| FT230D | 12V | BT19BL-BS | 22 Ah | 13.9 lb |
| FT265 | 12V | B16CL-B | 18 Ah | 15.7 lb |
| FT410 | 12V | — | 28 Ah | 23.2 lb |
| FT410L | 12V | BTX30L | 28 Ah | 23.2 lb |
| FT438-U1 | 12V | U1 | 35 Ah | 25.1 lb |
| FT438-U1R | 12V | U1R | 35 Ah | 24.9 lb |
| FT560 | 12V | 26R | 44 Ah | 33.3 lb |
| FT560L | 12V | 26 | 44 Ah | 33.3 lb |
Cars, trucks, Jeeps & off-road
Today’s vehicles carry more accessories than ever. Fullriver says Full Throttle exceeds those demands with more cranking power (CCA) and higher reserve capacity, in a tough ABS case packed with TPPL.
- Off-road ready: a burst of cranking in hot or cold climates and rapid recharge once the alternator is spinning.
- Light-duty cycling for winching, navigation, lighting and air systems.
- Car audio: consistent, long-running power to every component in a build.
| Model | Volts | Group | 20-hr | Weight |
|---|---|---|---|---|
| FT610-47 | 12V | 47 | 50 Ah | 42.1 lb |
| FT620-51 | 12V | 51 | 55 Ah | 40.3 lb |
| FT750-25 | 12V | 25 | 64 Ah | 48.1 lb |
| FT750-35 | 12V | 35 | 64 Ah | 48.1 lb |
| FT825-34 | 12V | 34 | 65 Ah | 46 lb |
| FT825-78 | 12V | 78 | 65 Ah | 46 lb |
| FT840-24F | 12V | 24F | 75 Ah | 54 lb |
| FT850-94R | 12V | 94R | 85 Ah | 55.7 lb |
| FT930-65 | 12V | 65 | 75 Ah | 54.9 lb |
| FT965-27 | 12V | 27 | 100 Ah | 71 lb |
| FT965-27F | 12V | 27F | 100 Ah | 71 lb |
Fleet, emergency & commercial trucking
Fullriver’s fleet catalog pairs Full Throttle sizes with police cruisers, police SUVs, fire-rescue vehicles and utility trucks.
- Police cruisers: FT680-48. Police SUVs: FT850-94R.
- Fire-rescue vehicles: FT930-65. Utility trucks: FT1100-31ST.
- High compression against vibration, and zero-spill with no maintenance.
Marine & watersports
Fullriver calls Full Throttle a true dual-service battery built for recreational marine life: hot or cold engine starts are no problem for its TPPL grids, and it recharges quickly thanks to low internal resistance.
- Tinned plates handle deeper cycling while lights and sound systems draw on the battery.
- Zero-spill: cabling and accessories aren’t damaged by corrosion.
- Sizes up to 8D for bigger boats.
Sources: Full Throttle Series page; FAQ; Full Throttle brochure; Full Throttle brochure 2; Why Fullriver AGM; installation manual; automotive sheet; off-road sheet; UTV sheet; fleet catalog; Jeep sheet; car audio sheet; marine sheet; fullriver.com. Group codes are Fullriver’s.
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FAQ RESOURCE HUB
Answers to the questions we get most.
How do I return something?
Contact us within 30 days of receiving your order and we'll send a return authorization. Items must come back new and unused; reuse the original packaging so the battery arrives back safely.
I received the wrong batteries, now what?
Contact us within 30 days and we'll ship the correct batteries free of charge and cover return shipping on the mistake.
Who pays for return shipping?
We do if it's our mistake, such as a wrong or defective item. Otherwise return shipping is yours: send it back with your own carrier, or we can provide a label and deduct its cost from your refund.
How long does a refund take?
Usually within four weeks of handing your return to the carrier, and often sooner. Shipping charges aren't refunded.
When will my order ship?
In-stock orders ship same day if ordered before 10am CST on a business day, with tracking on every order.
Is shipping free?
Items with the Free Shipping badge ship free. Everything else ships at our set rate for that item, based on how many you order or how much it weighs, and you'll see it at checkout before you pay.
How will it ship?
Most orders ship UPS. Orders over 700 lbs, or with any single item over 70 lbs, ship LTL freight on a pallet. Transit is 2 to 5 days on average.
What if my batteries are damaged in transit?
Contact us within 48 hours of delivery and we'll start the damage claim and ship a replacement immediately.
Do you ship outside the continental US?
Not through the website. Call us and we'll see what we can do.


