Good product functions as described. When connected to a DC source the load is always ON and when power fails the load is powered from the back up source i.e. battery. To use this as an Emergency Lamp application for powering the load only through the battery or Inverter type cutover and not having the power on continuously, a simple mod is needed. I cut the DC Power source track that goes to the NC side of the relay (see photo), so the battery is charged when the source supply is on. When the power fails the relay coil looses power and drops there by closing the NO contact and the circuit to the load is completed through the battery. I also use a CV CC type of regulator as my DC normally ON power source and you can adjust the charging parameters for the specific battery in use. This PCB circuit is a pass through and does not influence any charging parameters as stated int he description. There are literally 100's of applications for this product and overall highly recommended.

Good product functions as described. When connected to a DC source the load is always ON and when power fails the load is powered from the back up source i.e. battery. To use this as an Emergency Lamp application for powering the load only through the battery or Inverter type cutover and not having the power on continuously, a simple mod is needed. I cut the DC Power source track that goes to the NC side of the relay (see photo), so the battery is charged when the source supply is on. When the power fails the relay coil looses power and drops there by closing the NO contact and the circuit to the load is completed through the battery. I also use a CV CC type of regulator as my DC normally ON power source and you can adjust the charging parameters for the specific battery in use. This PCB circuit is a pass through and does not influence any charging parameters as stated int he description. There are literally 100's of applications for this product and overall highly recommended.

Good product functions as described. When connected to a DC source the load is always ON and when power fails the load is powered from the back up source i.e. battery. To use this as an Emergency Lamp application for powering the load only through the battery or Inverter type cutover and not having the power on continuously, a simple mod is needed. I cut the DC Power source track that goes to the NC side of the relay (see photo), so the battery is charged when the source supply is on. When the power fails the relay coil looses power and drops there by closing the NO contact and the circuit to the load is completed through the battery. I also use a CV CC type of regulator as my DC normally ON power source and you can adjust the charging parameters for the specific battery in use. This PCB circuit is a pass through and does not influence any charging parameters as stated int he description. There are literally 100's of applications for this product and overall highly recommended.

非常にいいです

very good

非常にいいです

この商品は良い状態で迅速に到着しました。品質は良いです。

This product is arrived in good condition and quickly. The quality is good.

この商品は良い状態で迅速に到着しました。品質は良いです。

短時間で受け取られるすばらしいプロダクト

Ottimo prodotto ricevuto in breve tempo

短時間で受け取られるすばらしいプロダクト

記述に従って渡されるプロダクト

products delivered according to description

記述に従って渡されるプロダクト

小包は、感謝渡されました。よいプロダクト。

the parcel has been delivered, thanks. products good.

小包は、感謝渡されました。よいプロダクト。

ありがとう、無事に届けられました!

Thank you, succesufully delivered!

ありがとう、無事に届けられました!

良い状態でお届けします。 広告された商品。

delivered in good condition. goods as advertised.

良い状態でお届けします。 広告された商品。

注文を受け取りました。 ありがとう、売り手

order received. thank you, seller

注文を受け取りました。 ありがとう、売り手

説明どおりに機能します。 お勧めします。

Funguje dle popisu.Mohu doporučit.

説明どおりに機能します。 お勧めします。