Battery Equivalents and Replacements

Antigravity AG-ATX20-RS Lithium Motorsport Battery

Antigravity AG-ATX20-RS Lithium Motorsport Battery is a lightweight and powerful lithium starting battery, being able to provide up to 680 CA and to replace equivalent lead-acid batteries up to 20-30Ah.

Antigravity AG-ATX20-RS Lithium Motorsport Battery is based on the Lithium Iron Phosphate (LiFePO4) chemistry and in combination with the built Battery Management System also offers so-called Re-Start feature, which can come very handy in many situations.

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Antigravity AG-ATX20-RS Lithium Battery Features and Specifications

Antigravity AG-ATX20-RS lithium battery feature physical dimensions of ~6.8 x 3.4 x 5.1 inches (~17.3 x 8.7 x 13 cm) and it weighs just 3.8 pounds (~1.72 kg).

Thanks to its dimensions and the fact that it features four battery terminals on top of the battery, the Antigravity AG-ATX20-RS battery is intended to replace lead-acid YTX15, YTX15L, YTX20, YTX20L, YTX20H, YTX20HL, and YTX20-BS Powersports batteries.

Unlike AGM or Gel-Cell and especially wet/flooded lead-acid batteries, Antigravity AG-ATX20-RS battery can be mounted in any position (most AGM batteries should NOT be mounted upside down!).

The nominal voltage of the battery is 12.8 volts and the actual capacity is 10 Ah, with an equivalent lead-acid battery capacity of 20-30Ah.

One of the most important features of the Antigravity AG-ATX20-RS battery is a combination of the safest lithium battery chemistry (Lithium Iron Phosphate, LiFePO4) with an advanced Battery Management System (BMS) that protects the battery from unwanted events.

However, modern AGM battery chargers that feature desulphation mode and older voltage regulators on bikes and similar vehicles (older than 1990-1995) can damage the BMS due to high voltage spikes!

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Antigravity ReStart Technology protects the battery from discharging too low - when the BMS sense deep discharge condition, the battery is automatically disconnected from the electric system with enough energy left for one (or few) more cranking attempt.

Note: In order to activate the battery, the user has to press the ReStart button ("PRESS TO RESTART") on top of the battery. After starting the engine, the battery is normally charged via the vehicle's built-in charging system.

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Another very important feature of the Antigravity AG-ATX20-RS battery is its very low self-discharge rate which allows the battery to be stored for up to a year in a cool and dry place.

If the battery is left connected to the vehicle's electric system, the battery will be able to crank the engine even after a year if there are no parasite loads (alarms and similar systems) that would discharge the battery over a long time of not being used (and recharged).

According to the official Antigravity website, the Antigravity AG-ATX20-RS battery comes with a 3-year warranty for personal use and a 1-year warranty for racing.

How To Charge and Maintain Antigravity AG-ATX20-RS Battery?

The easiest way of monitoring the Antigravity AG-ATX20-RS battery is by using Antigravity AG-BTR-1 Lithium Battery Tracker.

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Antigravity AG-BTR-1 Lithium Battery Tracker is connected directly to the battery and allows the user to directly monitor the battery's condition using the Antigravity smartphone App and Bluetooth connection.

Antigravity AG-BTR-1 Lithium Battery Tracker allows the user to monitor battery status including voltage, starting performance, and the charging system.

Also, the tracker provides real-time data and a history of up to 31 days.

The Antigravity AG-BTR-1 Lithium Battery Tracker also sends alerts to the user.

When mounted, the tracker draws 1 mA, which is not a significant drain for the 10Ah battery (that is daily just 24 mAh).

For more info, feel free to check the Antigravity AG-BTR-1 Lithium Battery Tracker Amazon link (link opens in the new window).

When the Antigravity AG-ATX20-RS battery is connected to the vehicle's charging system, the Antigravity AG-ATX20-RS battery is being charged properly, unless the charging system is faulty - faulty charging system may even destroy lithium batteries (not just Antigravity AG-ATX20-RS, but all starting lithium batteries with or without BMS).

When the Antigravity AG-ATX20-RS battery is charged with the battery charger, one should use either a dedicated lithium battery charger or an advanced AGM battery charger with a dedicated lithium battery charging mode.

One of the suitable battery chargers is the CTEK 56-926 Lithium 12V Battery Charger.

ctek 56 926 lithium charger

CTEK 56-926 Lithium 12V Battery Charger features a maximum charging current of 4.3 Amps and is suitable as the battery charger for lithium batteries from 5 to 60 Ah and as the battery maintainer for lithium batteries up to 120 Ah.

CTEK 56-926 Lithium 12V Battery Charger features 8 steps, fully automatic charging algorithm, maximizing the lithium battery’s performance and lifespan.

For more info, feel free to check the CTEK 56-926 Lithium 12V Battery Charger Amazon link (link opens in the new window).


antigravity atx 20 mLong Story Short: Antigravity AG-ATX20-RS battery weighs just 3.8 pounds (~1.73 kg), which is just a fraction of typical lead-acid YTX20L-BS and YTX20HL-BS batteries which on average weigh 13-18 pounds (~5.9-8.2 kg), allowing the user to easily save 10-14 pounds (4.5-6.4 kg).

Maybe 10-14 pounds difference doesn't sound much, and perhaps it is not for the everyday riders, but for applications where lightweight batteries are required and where every pound matters, this is great savings.

Also, Antigravity AG-ATX20-RS features a CA rating of 680 Amps, allowing the battery to start engines that are beyond the capabilities of most lead-acid YTX20L-BS and YTX20HL-BS batteries.

For more reviews and recommendations, feel free to follow the Antigravity AG-ATX20-RS Lithium Motorsport Battery Amazon link (link opens in the new window).

Amazon Search:

- Lithium Starting Battery

- Lithium Motorcycle Battery

- Lithium Powersports Battery

Note: Amazon links open in the new windows, feel free to check them for the most up-to-date offers and prices.