Antigravity AT7B-BS Re-Start Lithium Motorcycle Battery

The Antigravity AT7B-BS Re-Start Battery (AG-AT7B-BS-RS) is an ultra-lightweight Lithium Iron Phosphate (LiFePO4) starter battery engineered to directly replace OEM YT7B-BS and YT9B-BS lead-acid batteries. Dual-sport and adventure motorcycles frequently fall victim to parasitic battery drain from GPS units, auxiliary lights, and prolonged idle storage, or suffer dead batteries from leaving the ignition key on during trail stops. On conventional lead-acid or standard lithium batteries, over-discharge damages internal cells and leaves riders stranded in backcountry terrain without electric start.

Equipped with Antigravity’s patented RE-START technology, the AT7B-BS features an integrated Battery Management System (BMS) that actively monitors voltage. Before parasitic drain can drop the battery into a fatal over-discharged state, the BMS automatically puts the battery to sleep, preserving a reserve charge. Pressing the built-in Re-Start button on top of the battery (or using an optional handlebar remote harness) wakes the cells, providing instant cranking power to start the bike. Built into an OEM-spec case with a versatile 4-terminal post layout, the AT7B-BS delivers 360 Cranking Amps (CA) while shedding over 3.5 lbs (1.6 kg) compared to factory lead-acid units.

Features:

• Built-In Re-Start Reserve Technology: On-board BMS automatically puts the battery into a sleep state before critical drain occurs; wake it with the press of the top button to start the motorcycle.

• Massive Weight Reduction: Weighs just 1.54 lbs (0.7 kg), cutting approximately 70% of battery weight (saving 3.5+ lbs) mounted high in the subframe.

• High Cranking Output: Generates 360 Cranking Amps (CA) for immediate starter motor turnover on high-compression single-cylinder and twin engines.

• 4-Terminal Post Architecture: Quad-terminal configuration provides dual positive and dual negative posts for universal polarity connections and clean routing of auxiliary electronics (heated grips, GPS, battery leads).

• Full On-Board BMS Protection: High-tech internal battery management circuitry prevents over-discharge, over-charge, thermal runaway, and cell voltage imbalance.

• Stable LiFePO4 Chemistry: Lithium Iron Phosphate formulation provides superior thermal stability, long cycle life, and low self-discharge rates compared to standard lithium-ion or lead-acid batteries.

• Drop-In OEM Fitment: Exact dimensional case size match for standard YT7B-BS and YT9B-BS battery boxes.

What's in the Box:

• 1x Antigravity AT7B-BS Re-Start Lithium Powersports Battery (Part #AG-AT7B-BS-RS)

• 4x Brass Terminal Mounting Hardware Sets (M6 Thread Bolts and Retaining Nuts)

• 1x User Manual & Lithium Safety Guide

Fitment:

• 2025–2027 – Suzuki DR-Z4S

• 2000–2024 Suzuki DR-Z400

• 2001–2007 – Suzuki DR-Z250

• 2022–2026 Ducati Desert X / DesertX Rally

• 2003–2014 – Yamaha WR250F

• 2003–2015 – Yamaha WR450F

• 2008–2020 – Yamaha WR250R / WR250X

• 2022–2026 – Yamaha YZF-R7

• 2006–2017 – Triumph Daytona 675 / 675R

• 2008–2026 – Triumph Street Triple 675 / 765

• Any bike that uses the YT7B-BS, YTZB-4, YT9B-BS or YT9B-4 battery

Fitment Notes:

• Dedicated Lithium Charger is Mandatory: Never connect a standard automotive or automatic lead-acid battery maintainer to the AT7B-BS. Standard lead-acid chargers frequently incorporate high-voltage desulfation or "pulse" recovery modes that spike over 15.0 volts. Applying voltages above 14.6V will trip the internal BMS or permanently degrade the LiFePO4 cells. Always use a dedicated, constant-current/constant-voltage (CC/CV) lithium battery charger specifically programmed for 12.8V LiFePO4 chemistry (such as an OptiMate Lithium or CTEK Lithium US).

1. 1. Turn off the motorcycle’s ignition key and kill switch.
   2. Remove the seat or access panel to access the top of the battery.
   3. Depress the redRE-START button firmly once. The internal relay will mechanically click, waking the cells.
   4. Turn on the motorcycle ignition and start the engine immediately. Once running, the bike's charging system will automatically recharge the battery.

• Re-Start Wake-Up Procedure: If the motorcycle fails to illuminate its dash lights or turn over due to parasitic drain, the internal BMS has entered low-voltage cutoff to protect your reserve cranking capacity.

• Cold Weather Cranking Behavior: Lithium Iron Phosphate cells behave differently than lead-acid in cold temperatures (below 40°F / 4°C). Cold lithium exhibits higher internal resistance initially, which can make the first starter button press seem sluggish. This does not mean the battery is discharged. Turning on the headlight, auxiliary pod lights, or key for 30–60 seconds before cranking pulls an initial current draw that internally self-warms the LiFePO4 cells. On the second crank, the battery delivers full, fast cranking amperage.

• Terminal Bolt Installation Safety: The AT7B-BS utilizes precision brass terminal blocks. Thread the M6 terminal bolts in squarely by hand to avoid cross-threading. Torque terminal hardware firmly to35–40 in-lbs (4.0–4.5 Nm). Loose terminal hardware causes arcing under the 360-amp starting load, generating local heat that can melt terminal housings and cause intermittent electrical cutouts on the trail.

ANTIGRAVITY BATTERY PRODUCTS ARE LIMITED TO GROUND SHIPMENTS ONLY

Part Number: AG-AT7B-BS-RS