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teoman · 04-04-2018, 05:05 AM

Yes and no.

It has a small drain, i leave it in place. But if left for too long it will contribute to battery drain. (My car did not start after 3 months of sitting with dongle attached). It does have a led that is always on i think.

04-04-2018, 05:05 AM	#38 (permalink)
teoman Master EcoModder Join Date: Jan 2017 Location: Istanbul Posts: 1,245 A3 - '12 Audi A3 Thanks: 65 Thanked 225 Times in 186 Posts	Yes and no. It has a small drain, i leave it in place. But if left for too long it will contribute to battery drain. (My car did not start after 3 months of sitting with dongle attached). It does have a led that is always on i think.