Fenix E05R: A Rechargeable Keychain Torch for a Power Cut

The Fenix E05R is a rechargeable keychain torch that runs on a built-in 320 mAh Li-polymer battery and reaches 400 lumens on its Burst setting, with a beam of 64 metres¹. It is 68 mm long and weighs 24 g including the battery, so it hangs on a keyring without being noticed until you need it¹. For a household preparing for a power cut, that makes it a torch to carry rather than one to store in a drawer: the light you have with you when the lights go out is the one that helps.

Its real strength is the range of settings. Burst gives you a bright beam for finding your way, High runs at 150 lumens for 55 minutes, Medium at 25 lumens for 5 hours, and Low at 3 lumens for 30 hours². That last figure is the one that matters in a long outage: a soft, non-glare light that will still be working the next morning¹. It charges through a micro USB port hidden under a metal screw collar, and a full charge from empty takes approximately 1 hour¹.

There is no recall affecting this torch in the information available here. What follows covers what each setting does, how to work the side switch, how to charge it without damaging the seal, and what the warranty does and does not cover.

Four brightness levels and how far each one reaches

The E05R has four settings rather than a single on-off beam, and the difference between them is not just brightness but how far the light carries. Burst is the headline at 400 lumens with a 64 metre beam, High gives 150 lumens over 40 metres, Medium gives 25 lumens over 17 metres, and Low gives 3 lumens over 8 metres². The maker's manual gives the same distances and adds the beam intensity for each setting, from 1046 candela on Burst down to 15 candela on Low³.

What those numbers mean in a house is straightforward. On Burst you can light up a garden, a path or the far end of a loft. On High you can check a fuse box or walk a corridor. On Medium you can move around a room and read by it at a push. On Low you get a soft, non-glare light that the distributor describes as suited to night reading and emergencies¹. If you want to understand how lumens and beam distance relate more generally, our page on lumens, beam distance and run time explains the terms.

Two details shape how the beam behaves. The torch uses a TIR lens rather than a plain reflector, which is what produces a defined beam rather than a wide wash¹. And it has Advanced Temperature Regulation, which adjusts output according to the working and ambient temperature². The distributor also states that when the light reaches 60°C or above it automatically steps down a few lumens, and allows you to reselect a mode once it drops below 60°C¹. In practice a small torch left on its brightest setting will dim itself rather than overheat, which is normal behaviour, not a fault.

Run time on each mode, from under an hour to 30 hours on low

The run times are where a keychain torch either earns its place or does not. On Burst the E05R runs for 55 minutes, and the maker's manual notes that this figure is measured including output at reduced levels due to temperature or the protection mechanism³. In other words, the 55 minutes is not 55 minutes at a flat 400 lumens: the torch will step down as it heats, which is why the manual is careful about how the figure is stated.

High is listed at 55 minutes at 150 lumens, Medium at 5 hours at 25 lumens, and Low at 30 hours at 3 lumens². The jump from 5 hours to 30 hours between Medium and Low is the practical heart of the torch. If a power cut lasts an evening, Medium is comfortable. If it lasts into a second day, Low is what keeps a light in your hand. Our page on how long a torch battery lasts on low looks at that trade-off across torch types.

The maker states that these specifications come from laboratory testing to the ANSI/PLATO FL1 standard, using the built-in 320 mAh Li-polymer battery at 21±3°C and 50% to 80% humidity³. That matters when you compare the figures with your own experience: a cold garage in January, or a torch that has been in a pocket all day, will not match a laboratory. Treat the run times as a fair guide to relative performance rather than a promise for every condition.

Using the side switch: on, off, modes, instant burst and lock

The E05R is controlled by a single metal side switch, and the timings are specific enough to be worth learning before you need them in the dark¹. Press and hold the switch for 0.5 seconds to turn the light on or off. With the light on, a single click cycles through Low, then Medium, then High. To reach Burst instantly, press and hold the switch for 1.2 seconds, and when you release it the light returns to Low¹.

That instant Burst is the feature most worth practising. If you hear a noise outside or need to see across a garden quickly, a 1.2 second hold gives you the full 400 lumens without cycling through settings¹. Releasing returns you to Low, which is a sensible default: it will not dazzle you or drain the battery while you decide what to do next.

The lock matters just as much for a torch that lives on a keyring. With the light off, double click the switch within 0.5 seconds to lock it, and the light blinks twice on Low to confirm. To unlock, double click again within 0.5 seconds, and the light comes on at Low¹. A keychain torch that switches on in a pocket will be flat when you need it, so locking it before it goes into a bag is a habit worth forming. Our guide to charging and storing rechargeable torches safely covers the wider routine.

Charging through the hidden micro USB port

The charging port sits under a metal screw collar, which is how the torch keeps a small body while still offering a sealed connection¹. Unscrew the collar to expose the micro USB port, connect the supplied cable, and the indicator shows red while charging and turns green when full¹. A full charge from empty takes approximately 1 hour¹.

The distributor describes the design as hiding the micro USB port to keep it safe from dirt and water, with a waterproof aluminium charge socket cover¹. That is the point of the collar: the port is only exposed while you are actually charging. The instruction that follows is the one to remember: once charging is completed, tighten the light head again to maintain the dustproof and waterproof ability¹. A torch left with the collar loose is no longer IP68, however good the seal was when it left the factory.

A few practical points follow from the maker's figures. Because the battery is built in and not user replaceable, and the distributor lists no compatible batteries, there is no spare cell to swap in mid-outage¹. Charging is the only way to top it up, so a power bank or a charged laptop becomes part of the plan. Our page on rechargeable or battery torches for emergencies sets out the trade-off between the two approaches, and our guide to torch batteries explains built-in packs.

Keeping it waterproof: the IP68 seal, the screw collar and the O-ring

The E05R is rated IP68 for waterproofing and dust proofing¹. That rating is only as good as the seal, and the seal depends on two things: the screw collar being tight, and the O-ring being in good condition. The distributor states plainly that long-term use can result in O-ring wear, and that to maintain a proper water seal you should replace the ring with an approved spare¹. The maker's manual carries the same instruction³.

This is why the spare O-ring in the box matters. It is not a random extra; it is the part that keeps the torch's water resistance working over years of use. Keep it somewhere you will find it, and fit it when the original shows wear rather than after the torch has been dropped in a puddle. If you want to understand what IP ratings mean more broadly, our page on what IPX ratings mean for torches and lanterns explains the scale.

The body itself is A6061-T6 aircraft grade aluminium with a hard anodised finish, which is the shell that the collar and O-ring seal against¹. The torch does not stand on its tail, so it is not designed to be left upright on a shelf as a room light¹. For lighting a room during an outage, a lantern is the better tool; our guide to battery and rechargeable lanterns covers those, and our comparison of lantern or torch explains which lights a room better.

Warranty and what voids it

The E05R carries a 2 year UK warranty¹. The condition that matters most is stated directly: disassembling the sealed head can cause damage to the light and will void the warranty¹. That is consistent with the rest of the design, where the LED is not replaceable and the entire light should be replaced when the LED reaches the end of its life¹. There is no user service inside the head, and opening it costs you the warranty as well as risking the seal.

The two distributor pages disagree on the LED type, so treat the emitter as unconfirmed and rely on the output and run time figures, which both pages give consistently. If the LED type matters to you, ask the retailer before buying rather than relying on either listing.

For support, the practical route is the retailer or distributor you bought from. Keep the warranty card that comes in the box³. If a torch or its charger is ever subject to a safety notice, our page on recalled and unsafe torches and chargers explains how to check and report. And if you are building a lighting plan for the whole house rather than a single keyring torch, start with our section on emergency lighting at home, which sets torches, lanterns and candles side by side.