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Exakt EX100AGM, 12 V 100 Ah C100 AGM VRLA review

A 12 V 100 Ah valve-regulated AGM battery rated at the C100 hour rate, published with dimensions, post type and polarity, and supplied ready to use.

The bottom line A competent AGM replacement with the physical details a swap needs and a C100 rate beside its capacity. It makes a claim about charging speed and publishes not one charging figure, which is the gap between the two bullets.

A 100 Ah valve-regulated AGM in the standard 278 mm case.

What VRLA means on the page

Valve-regulated lead-acid: the acid is bound in glass mats and a valve manages internal pressure. The first two bullets say so directly, which is more precise than the word “sealed” and is the reason this construction can go inside a vehicle.

The fitting details

278 × 175 × 190 mm, round standard posts, positive on the right, and vibration-resistant construction. The same case as the SOLIS and the Electronicx on this page, which makes the three interchangeable on fit.

The claim that goes nowhere

The fourth bullet says the battery charges considerably faster than conventional models thanks to an optimised plate structure and low internal resistance. No charging voltage. No maximum charge current. No absorption or float figure. A charging claim with no charging numbers cannot be used to set anything.

Cycle life, nowhere stated

A cycle count, a depth of discharge, and any low-temperature figure. The four-times life claim compares the battery to something the listing never identifies.

Availability

German Amazon store quoted about 120 € when this page was compiled.

American Amazon catalogue carries an entry for it, with nobody selling.

British, French, Italian and Spanish Amazon stores returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

What it gets right, and what it leaves out

Strengths

  • The capacity carries its C100 rate
  • Post type, polarity and dimensions are all published together
  • Valve-regulated construction is named explicitly rather than left as “sealed”

Compromises

  • No charging voltages or currents at all, despite a bullet claiming faster charging
  • The four-times life claim names no comparison
  • No cycle count anywhere

Specifications

Capacity100 Ah at the C100 rate, 12 V, first bullet
ChemistryAGM VRLA — valve-regulated, maintenance-free, with the acid bound in glass fibre mats, first and second bullets
Alternator and shore chargingAbsent as figures; the fourth bullet claims faster charging than comparable models from a low internal resistance, with no voltage or current published
Low-temperature protectionNowhere in the listing
Mounting constraintsRound standard posts, positive on the right, vibration-resistant, first and third bullets
Dimensions278 × 175 × 190 mm, first bullet
Amazon referenceB0F4Y3ZZHW (same reference on 2 Amazon marketplaces)
EAN4262471534392

Questions owners ask about this one

What does VRLA add over “sealed”?

It names the mechanism: a valve regulates internal pressure and vents only under fault conditions, which is what allows the battery to be installed in an occupied space. “Sealed” is a description; VRLA is a construction.

Why does the missing charging voltage matter here?

Because the listing claims the battery charges faster than comparable models. A claim about charging that publishes no voltage and no current cannot be acted on — a charger still has to be set to something, and this page does not supply a figure the maker did not.