Avery Bailey 🥉

Match 12V and the right chemistry, lead acid for most and AGM for stop start. A 10 amp smart charger can get it started in a few hours and but finish with a full charge so it does not stall again.

As someone who's worked on cars for years, including plenty of Honda Civics like your 2015 sedan, I can tell you that most that model gauges are accurate enough for passenger cars and provided you follow the right steps but then... always measure cold tires, meaning the vehicle hasn't been driven recently, on a flat surface to avoid any tilt affecting the reading. Remove the valve stem cap, apply the gauge squarely to prevent air loss, and take the PSI reading immediately. Refer to the manufacturer's recommendation on the driver's side door frame, typically around 32 PSI for your model. If it's below that, add air accordingly and verify again. Consistent monitoring every month or so helps with that model longevity and better mileage. Helps a lot.

The older adapters are often classic Bluetooth based and a lot of them use the old ELM327 v1.5 clones that drop packets... iPhones do not talk to those at all unless they are WiFi and and even on Android they can be flaky. That actually likely explains why your friend's unit would not stay connected. Get a BLE adapter that specifically says iOS compatible, then connect from inside your app rather than adding it in the phone Bluetooth menu. Start the car, plug the adapter in firmly, open Car Scanner or Torque, pick the adapter, then run the scan. You will be able to read and clear P codes and check monitors right away.

In the shop we see small packs fail when the vehicle battery is so flat that system voltage collapses. Many packs refuse to output if they do not see enough voltage, so they shut off the instant you twist the key. If your unit has a force or boost mode that bypasses the sensor for a short window, use that only long enough to spin the engine. Cold oil raises the torque needed to crank. If you are running thicker oil than recommended the starter current can jump, so in winter the margin disappears. Kill every accessory, foot off the brake on push button cars to avoid waking extra modules, neutral instead of park sometimes helps. And if the battery is older than four years do not expect miracles from a pocket pack.

Choose barista-labeled shelf-stable oat with dipotassium phosphate or another acidity regulator plus gellan gum and a touch of rapeseed or sunflower oil for stable microfoam without extra sweetness. Start very cold in a small pitcher, add a whisper of air for a second, then keep the tip buried to roll a whirlpool until the pitcher is hot but still comfortable to hold.