# GeekVape mod, reading the Aegis spec sheets to buy one that lasts > Each GeekVape mod read from the maker's own sheet, Legend 5, Solo 5, Solo 3 and Mini 5, with output limits, cells, IP68, firmware and warranty. Every mod GeekVape makes carries the same family name, Aegis, and the same promise of toughness. On the shelf, a 200 W **GeekVape mod** and a 100 W one look cut from the same cloth, both sold on the same Tri-Proof protection. The sheets the brand publishes tell rather different stories, though, about the cells, the output voltage and what the warranty actually covers. Those rarely read lines decide how many years the mod spends in your pocket. ## Which GeekVape mod to choose if you want it to last The answer comes down to one rule. To last, a GeekVape mod should run on cells you can replace, and its power range should suit the tank you screw onto it. In the current line-up, three models meet the first condition, the Legend 5 on two 18650 cells, the Solo 5 on one 18650 or 21700 cell, and the Solo 3 in its external-cell version. For a single-cell mod, the Solo 5 ticks the most boxes on paper. It takes a 21700, ships with an 18650 adapter in the box and keeps its IP68 rating. The Legend 5 only makes sense if you genuinely vape above 100 W. The Mini 5 and the built-in battery Solo 3 are well-made mods, but their working life ends with their battery. ## The current GeekVape mods, from the maker's sheets The figures below come from the sheets GeekVape publishes on its own site and its official store. An empty cell marks a value the brand does not publish. | Mod | Power source | Output | Max output current | Max output voltage | Protection | Screen | |---|---|---|---|---|---|---| | Aegis Legend 5 | 2 × 18650 (7.4 V) | 5 to 200 W | 45 A | 12 V | IP68 | 1.08 inch colour | | Aegis Solo 5 | 1 × 18650 or 21700 | 5 to 100 W | 30 A | | IP68 | 1.08 inch | | Aegis Solo 3 | 1 × 18650 or built-in 3000 mAh, depending on version | 5 to 100 W | 32 A | 7.5 V | IP68 | 0.96 inch | | Aegis Mini 5 | Built-in 3200 mAh | 5 to 100 W | | | IP67 | 0.96 inch | The Legend 5, Solo 3 and Mini 5 run on the AS Chip 4.0, which GeekVape describes as a buck-boost chipset designed to hold a steady output as the cell drains. The Solo 5 sheet does not name its chip. The gap between these mods lies less in the electronics than in the power source and the electrical limits. ## Tri-Proof, what GeekVape's IP68 and IP67 cover GeekVape sums up its Tri-Proof protection in three figures. According to the brand, its IP68 products can be submerged to 1.5 m for 30 minutes, are fully dustproof and survive 2 m drops. The Mini 5 settles for IP67, a lower water rating. The Legend 5 sheet adds a line that is rarely read, an operating range of 0 to 45 °C, with storage from -20 to 60 °C. A waterproof **GeekVape mod** is therefore not meant to run below freezing, nor to sit on a dashboard in full sun. The Solo 3 sheet gives the same 0 to 45 °C range for charging. ## Reading the output current and voltage of a GeekVape mod These two columns set what the mod can really send to the coil. They matter as soon as you move away from the coils supplied in the kits. ### Very low resistance and the current ceiling Power equals current squared times resistance. On the Legend 5, 200 W into 0.1 Ω needs the square root of 200 ÷ 0.1, which is 44.7 A, just under the stated 45 A. The sheet is consistent with its 0.1 to 2 Ω range. The Solo 5 tops out at 30 A. To deliver its full 100 W, the coil must be at least 100 ÷ 30², which is 0.11 Ω. On a 0.1 Ω build it cannot go past 30² × 0.1, which is 90 W. ### High resistance and the voltage ceiling Power also equals voltage squared divided by resistance. The Solo 3 puts out at most 7.5 V, so 100 W is only reachable below 7.5² ÷ 100, which is 0.56 Ω. On a 1 Ω coil the real ceiling drops to 56 W. With 12 V, the Legend 5 holds its 200 W up to 0.72 Ω and still reaches 144 W on 1 Ω. ## Removable cells or built-in battery, the longevity test This is the point that separates a mod you keep from a mod you replace. Each model in the range handles it differently. ### The Legend 5 and its two 18650 cells in series The two cells sit in series, hence the stated 7.4 V. The same current then flows through both. At 200 W, with nearly flat cells at 3.2 V each and 90% efficiency, it comes to 200 ÷ (6.4 × 0.9), which is 34.7 A per cell. GeekVape recommends high-drain cells in its FAQ, and the sum shows why. The sheet also states that both ends of the cells must be flat for the battery door to close. A button-top cell will not do. ### The Solo 5 and the move to 21700 One cell at 100 W in the most demanding case means 100 ÷ (3.2 × 0.9), the same 34.7 A, to be checked against the continuous discharge rating the cell maker publishes. What the larger format changes for battery life and cell choice is covered in [our feature on moving to a 21700 mod](/uk/21700-box-mods/). The 18650 to 21700 adapter comes in the box, so your existing cells still work at first. ### The Solo 3 and Mini 5, two sealed batteries The Solo 3 comes in two versions, one with an external 18650 cell, the other with a built-in 3000 mAh battery. Check the exact reference before buying. The Mini 5 only exists with its 3200 mAh battery, charged at 5 V and 3 A, reaching 80% in 40 minutes according to GeekVape. That convenience has a cost the day the battery wears out, because the whole mod goes with it. Our [guide to what makes a box mod last](/uk/what-is-a-box-mod/) puts this point first. ## Firmware, warranty and authenticity, where GeekVape draws the line Three of the brand's rules weigh on how long a mod lasts, and they sit in the support pages rather than on the product sheets. GeekVape states that its products have received no firmware updates since 1 September 2021, and advises against installing any. A mod that will not switch on after an update is not covered by the maker's warranty. The original software is the one to keep. The maker's warranty runs for 90 days from purchase and goes through the retailer or the authorised distributor. The brand asks for proof of purchase, a photo of the serial number and authenticity code, and a video of the fault. In the UK, this sits alongside the rights a buyer already has against the retailer under the Consumer Rights Act 2015. The authenticity code sits under a scratch-off label. GeekVape describes it as a 14 character code of letters and numbers, to be entered on the verification page of its site. ## FAQ Five questions the GeekVape sheets raise without always answering. ### Can a GeekVape mod be charged in freezing weather? The Solo 3 sheet limits charging to a range of 0 to 45 °C, and the Legend 5 sheet gives the same range for use. A mod left outside in winter is best brought back to room temperature before it is plugged in or used. ### Should I look for a firmware update on a second-hand GeekVape mod? No. GeekVape says it has published no firmware since 1 September 2021 and advises against installing any. A file presented as an update is therefore not offered by the brand, and a mod that stops switching on after an update falls outside the manufacturer's warranty. ### What tank capacity comes with the Solo 3 kit in the UK? GeekVape lists 5.5 ml for the Z Subohm 2021 tank and 2 ml for its TPD version. UK rules cap refillable tanks at 2 ml, so the TPD version is the one sold in Britain, and nicotine e-liquid is limited to 20 mg/ml in 10 ml bottles. ### What should I do if the mod shows overheat protection? GeekVape's FAQ advises removing the cells when they are removable and letting the mod rest for 30 minutes. If it stays too hot to touch, or the warning returns when cold, the brand points you to its support team. ### Why does the mod show "No Coil" or "Atomizer Short"? GeekVape suggests trying another tank that works on a different mod, then checking how the coil is built. For a warranty claim, the brand then asks you to show that at least two tanks fail on the mod. ## A GeekVape mod chosen on its sheet, not its name The Aegis name says almost nothing about longevity. The power source, the output current and voltage, the temperature range and the firmware rule say far more, and all of it can be read before buying. A **GeekVape mod** on replaceable cells, run within the limits of its sheet and left on its original software, is set up to last. The same reading also works for other brands that group their mods into families, as Vaporesso does with GEN, Armour and Target. ## Also in the lounge - [Vaporesso mod ranges compared, GEN, Armour and Target](/uk/vaporesso-mods-range/) - [Moving to a 21700 mod, what the bigger cell really changes](/uk/21700-box-mods/) - [What a box mod is, and the parts that make it last](/uk/what-is-a-box-mod/) The Fumoir writes for adult readers only. Vaping products can contain nicotine, which is addictive, and nicotine vaping products are not for sale to anyone under 18 in the UK. This editorial feature is not a buying recommendation.