Have recently setup a LFP, AKA (Lithium Iron Phosphate), AKA (LiFePo4) battery setup.

Came with a Jikong - JK BMS.

Fine that it comes with BT enabled, so you can monitor & change settings with your mobile.
For monitoring, that becomes inconvenient for some, like me, that don't always have their phone with them & the system is in the outdoor shed.

I order a Jikong display unit from ebay, comes with no instructions. But hey it's just a display, should be simple.

I set it up, turn it on, displays the relative data from the BMS, then turns off after 10 seconds. I'm thinking is there something wrong WTF!

No matter how many times it gets turned on it turns off, so I google a manual () & look at the logic (see below).

4.3 显示屏亮灭逻辑 Display on/off logic
为了降低功耗，特定义以下逻辑：In order to reduce power consumption, the following
logic is defined:
静态：无放电流、未操作按钮、充电时，10 秒后灭屏；Static: no discharge current, no
button operation, charging, screen off after 10 seconds;
放电：当放电电流大于 0 时，显示屏常亮；Discharge: when the discharge current is
greater than 0, the display is always on;
按键：当按下显示屏按键后，显示屏亮灭状态切换，如按键按下前是亮屏状态，按键后
则会灭屏；如按键按下前是灭屏状态，按键后则会亮屏；Button: short press to turn
on/turn off display;
WTF!: the display logic, to reduce power consumption, is to have it on all night, when no power is coming in on a solar input system or under heavy draw during the day when power is coming in, & turns off after 10 seconds during the day, when battery is charging when you might actually want to look at it.
Wouldn't the logic be better to just have an on off, user controlled?
Measured power usage difference between on or off is insignificant. ~0.12W

Apart from that, it appears accurate (as to what the BMS app is also showing) & displays the most important information for a quick glance at the battery SOC, battery voltage & system input/output condition.

Would I recommend it, yes. It's only $26. It just could be better - on or off, if it was my choice. ¯\_(ツ)_/¯