SEVR EV Portable Charger (10A)
Slow, steady 2.3 kW charging from any power point.
Some owners worry a 'granny charger' is bad for the battery. It's the opposite.
No. Slow AC charging from a power point is the gentlest way to charge an EV battery: the low current produces little heat, and heat is what ages batteries fastest. Frequent DC fast charging, sitting at 100% for long periods, and extreme heat do more harm. Follow your manufacturer's advice on daily charge limits; many cars with LFP batteries are happy to charge to 100% regularly.
| LFP (lithium iron phosphate) | NMC / NCA (nickel-based) | |
|---|---|---|
| Common in | Many BYD models, Tesla Model 3 and Y RWD, MG4 Excite and other entry variants | Long-range and performance variants of many brands |
| Typical daily charge advice | Often 100% regularly (so the car can calibrate) | Often 80–90% for daily use, 100% before trips |
| Heat tolerance | Good | Good, but more sensitive to time at high charge |
Slow, steady 2.3 kW charging from any power point.
3.45 kW on a dedicated 15 A outlet: still gentle, about 50% faster.
Generally yes. Slow AC charging produces less heat than DC fast charging, and heat is the main thing that ages a battery. Charging from a power point is about as gentle as it gets.
No. Frequent shallow top-ups are easier on a battery than running it low and filling it up. Set the charge limit your manufacturer recommends.
It depends on the battery. Many LFP-battery cars recommend charging to 100% regularly; many nickel-based batteries recommend 80–90% for daily use. Follow your manual.
No. The battery doesn't care what the charger is called; a portable charger simply delivers power slowly, which is easy on the battery.