How does the lcd display connect to the d250sa? is it via cable or bluetooth? thanks

It is a device which works without the d250sa and has no connection to it. It is manufactured for CTEK by NASAMARINE (BM1 Compact). You connect it to the service battery and you can use it without the D250SA.

40-256 On-board Charger and Display

Product ID: 68225798

Details

Brand
CTEK
Colour
black
Input voltage
14 Volts
Item weight
1.8 Kilograms
Output voltage
12 Volts

⚡140A max energy flow

💧IP65 splash & dust-proof

🌡️Smart temp sensor

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HK$8702

Duties & taxes included

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Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
CTEK
Colour
black
Input voltage
14 Volts

Description

⚡ Charge smarter, drive further — never get left behind!

RUGGED DURABILITY - IP65 rating ensures splash and dust resistance for all-weather reliability
SEAMLESS INTEGRATION - On-board charger with display designed for effortless monitoring and control
PRECISION AGM CHARGING - Switch between 14.4V or 14.7V for optimized battery health and longevity
MAXIMIZED POWER EFFICIENCY - Delivers up to 140A for rapid, reliable energy management on the go
ADAPTIVE TEMPERATURE CONTROL - Built-in sensor adjusts charging to cold climates, preventing battery strain

The CTEK 40-256 On-board Charger and Display is a robust 20A off-grid charging system engineered for professional-grade battery management. Featuring adjustable AGM modes (14.4V/14.7V), a temperature sensor for cold environment optimization, and an IP65 splash/dust-proof rating, it ensures maximum battery efficiency and durability. Perfect for millennial managers who demand reliable power on the move, this charger delivers up to 140A energy flow with a sleek display for real-time monitoring, backed by a 2-year warranty.

Specifications

ASIN	B07D7LTLZR
Best Sellers Rank	1,016,660 in Automotive ( See Top 100 in Automotive ) 2,599 in Car Battery Charging Units
Box Contents	On-board charger; spared display; user guide
Brand Name	CTEK
Colour	black
Country of Origin	China
Current Rating	20 Amps
Customer Reviews	3.5 3.5 out of 5 stars (13)
Global Trade Identification Number	07340103402565
Input Voltage	14 Volts
Item Type Name	20A off-grid charging system: on-board charger and display for charging the additional battery while driving
Item Weight	1.8 Kilograms
Manufacturer	CTEK
Manufacturer Part Number	40-256
Model Number	40-256
Output Voltage	12 Volts
Product Warranty	2 Year

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