Mares EOS 20RZ Dive Torch in Silver

Mares EOS 20RZ Torch: Rechargeable Primary or Backup Dive Light with Adjustable Focus

The Mares EOS 20RZ is a compact, aluminium-bodied dive torch built for recreational divers who want a capable light they can take to 120 metres maximum depth and recharge via USB between dives.

If you dive wrecks, caverns, or low-visibility conditions and want a single light that handles both wide ambient illumination and tight, focused beams, this one is worth a close look.

Output and Beam

The EOS 20RZ runs a CREE XP-L LED with a maximum output of 2,300 lumens, which is enough to light up a swim-through or cut through murky green water.

Where this torch stands apart is its magnetically adjustable focus. You can shift between a tight 12-degree spot beam for reading hull markings at distance and a wide 75-degree corona for broad ambient coverage when you are inside a wreck or moving along a reef. That flexibility means you are not carrying two lights for two jobs.

Three LED light sources contribute to that spread. The colour temperature sits between 5,700 and 7,800 Kelvin, which puts it in the cool-to-neutral white range. That rendering works well for navigation and photography reference, though it leans clinical rather than warm.

Burn Time and Battery

At maximum output you get 105 minutes of burn time from the internal ICR26800 lithium-ion cell.

For most single recreational dives that is more than enough headroom. If you are doing multiple dives in a day, the built-in LED charge indicator lets you check battery state before you kit up, so there are no surprises at depth.

Charging is via USB cable, which is included. That means no proprietary charger to forget and no hunting for a 12V outlet on a liveaboard.

Switch and Lockout

The EOS 20RZ uses a magnetic switch, which has no physical button to seal against water ingress. Magnetic switches are reliable at depth and simple to operate with gloves on.

There is also a lockable switch. Lock it before you pack the torch in your bag and it will not drain the battery or fire up accidentally in transit. This is a small thing that matters more than it sounds if you travel frequently.

Build and Size

The body is aluminium, which dissipates heat better than plastic and holds up to knocks against hard surfaces inside wrecks. The silver finish is anodised aluminium rather than paint.

Dimensions are 202 x 62 mm and the torch weighs 579 grams with the battery. That is a substantial handheld light, not a clip-on backup. Plan to hold it or mount it on a goodman handle or tray if you are a photographer.

The rated maximum depth is 120 metres, which exceeds recreational limits by a wide margin. For a recreational diver that means the housing is not a weak point in any realistic scenario.

Who This Torch Suits

The EOS 20RZ is a strong match if you regularly dive in low light or overhead environments and want one light that adjusts to the situation rather than a fixed-beam torch.

It is also a practical choice for liveaboard travel, where USB charging and a lockable switch simplify daily logistics.

It is not the right pick if you want a small clip-on backup light or something that disappears into a pocket. At 579 grams and 202 mm long, this is a primary torch that expects to be held.

If you only dive clear, well-lit tropical reefs in daylight and rarely enter overhead environments, the adjustable focus and high output may be more torch than your diving actually needs.