? Sleep current 0.1 – 0.2mA, ? Operating voltage: 2.1 – 3.6V, ? Operating current: 150mA, ? Built-in Li-ion battery 500mAh.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($30.07): BGCARELEC
2. ($31.17): BGAutos
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): pllabfun, e2bcea, BgAuMotor, b71c67, AM15prime, BGNDVRs, AMPrime01, 0e7f33, BGHD13
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Car Tire Pressure Solar Gauge [EU/CZ] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Car Tire Pressure Solar Gauge. The lowest price was: $17.59.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).