22-09-2026
Sizing a VRLA Battery for Runtime and Cycle Life
Work out the load, the runtime and the right derating so a sealed lead-acid battery lasts the design life — not just the first winter.…
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18-09-2026
Constant-Voltage vs Constant-Current: Driving LEDs
LEDs are current-driven devices, so the wrong supply can dim, flicker or destroy them. Here is how to choose between a constant-voltage and a constant-current driver.…
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18-09-2026
Choosing a UPS: Offline, Line-Interactive or Online
Offline, line-interactive or online double-conversion? A quick guide to matching UPS topology, transfer time and runtime to the equipment you need to protect.…
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18-09-2026
Battery Chargers and Power Supplies Are Not Interchangeable
A bench supply set to 13.8 V will charge a lead-acid battery, after a fashion. Doing it properly needs behaviour a plain power supply does not have.…
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15-09-2026
IP Ratings Explained: Powering Kit in Damp, Dusty or Outdoor Places
IP65, IP67, IP20 - the two digits tell you what a supply can shrug off. Here is how to read them.…
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15-09-2026
MTBF, Service Life and Warranty: What Each One Promises
A supply quoting 700,000 hours MTBF is not expected to last eighty years. The three reliability numbers on a datasheet answer three different questions.…
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