Reading the Spec
Water-resistant, weatherproof and splashproof are words, not ratings
Some water claims point at a defined test with a number behind it. Others are adjectives a marketing department chose because…
Shalini Varma
Contributing writer, Best Pro Deals
Shalini writes category guides and prefers explaining a market to ranking it.
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18 articles
Reading the Spec
Duty cycle is the number that decides whether a tool survives the job
A duty cycle states how much of a fixed period a machine can work at a given output before it must rest. It is a thermal limit, and…
Reading the Spec
Every category has one number that is cheap to increase
When a market settles on a single figure to compete over, engineering effort moves to that figure. The number keeps rising long…
Reading the Spec
Advertised weight leaves out the parts that make it work
Weight is one of the few specifications that is hard to fake and easy to omit. What gets excluded from the figure is a consistent…
Category Guides
In a washing machine the bearing decides how long the machine lasts
Most washing machines are retired for one reason, and it starts with a seal rather than a bearing. Whether that ending is a repair…
Category Guides
Kitchen knives trade hardness against toughness and nothing escapes it
Steel chemistry, heat treatment and edge geometry decide how a knife cuts and how it fails. All three pull against each other, and…
Category Guides
An office chair is a mechanism with upholstery attached
Comfort in a chair comes from adjustment range and mechanism behaviour, not from padding. The padding is what fails first and what…
Category Guides
Mattresses are made hard to compare, and that is a business decision
The same product appears under different names in different shops, which prevents price and specification comparison. Underneath…
Category Guides
Headphones are judged by measurement and bought by preference
Frequency response can be measured precisely and interpreted several ways. Fit and seal change the result more than most…
Category Guides
On a suitcase the wheels and the handle are the product
Shell material gets the attention and almost never fails. The parts that end a suitcase are the ones taking load and impact at…
Category Guides
A waterproof jacket is a membrane, a face fabric and a coating that wears off
Waterproofing and breathability are measured by separate laboratory tests with their own units. The thing that usually fails first…
Category Guides
Espresso machines are priced by temperature stability and pressure control
The visible differences between price bands are cosmetic. The engineering differences are in how steadily water arrives at the…
Reading the Spec
Input power is what you pay for and output power is what you get
The same appliance can be sold on two completely different wattage figures. One describes electricity consumed, the other describes…
Category Guides
In a screen the panel decides the picture and the backlight decides the black
Display marketing runs on a handful of numbers that describe laboratory conditions. The physical construction underneath explains…
Category Guides
Running shoes are a foam, a last and a rubber compound
Athletic footwear is sold on names and technologies. Underneath, three physical decisions govern how a shoe fits, how it feels and…
Reading the Spec
A temperature rating assumes a person, a room and a floor
Thermal ratings come out of a test with a defined set of surrounding conditions. Change any of those conditions and the number…
Category Guides
In a laptop the cooling decides what the processor is worth
Two machines with the same processor can deliver very different sustained performance. The difference is thermal, and almost none…
Category Guides
A helmet is a crushable liner with a shell to hold it together
Protection comes from a material that is designed to be destroyed. Everything else on a helmet exists to keep that material in the…