Dual-display power meter for 12V–72V battery systems. The upper 8-segment bar shows remaining power (2 red, 6 green) while the lower digital voltmeter provides the battery voltage with an auto-shifting decimal point for accuracy. Wide compatibility: supports lithium ion, LiPo polymer, NiMH, lead-acid, car and electric vehicle battery packs. Suitable for 12V–72V systems and general power measurement needs. Compact, easy to install: designed for dashboard or panel mounting in bikes, cars, RVs, and workshop setups. Lightweight yet durable for everyday use. Clear, actionable data: quick state-of-charge visibility, helps plan charging, reduces the risk of unexpected power loss, and supports routine maintenance checks. Use scenarios: - Monitor e-bike or scooter battery range on the go. - Check car, truck, or EV battery health during maintenance. - Monitor DIY energy storage or battery pack tests in a lab or workshop.