couple weeks ago was going on Vacation for two weeks put my 2020 F150 on the trickle charger a week and a half latter my phone says you are in battery saver mode. truck is in deep sleep mode. has this happen to anyone

 

Has the truck been inactive for 14 days?
See here:https://www.ford.com/support/how-tos...ep-sleep-mode/

 

I thought the Trickle charge would stop it guess it was the 14 days thanks

 

Just because I'm pedantic, I feel obligated to say that I hope you mean one of the modern "smart" battery maintainer / tender / charger, and not one of the old-school trickle chargers, because those can damage your battery. Although you almost never see the true old school constant amperage style anymore.

 

I am showing my age I still call them modern "smart" battery maintainer A trickle charger

 

I think the trick to avoiding deep sleep is to use Fordpass to lock/unlock the truck by the thirteenth day.
Or, start and then kill the truck.

 

Looking for a bit more info on this one.

I have a Sears battery charger that's perhaps 12-15 years old that has a jump feature and a charge feature with two settings. You're saying that this is no longer any good for new batteries?

 

You would have to check the battery voltage after it reaches full charge to see if it stops charging and leaves the battery floating around 13.2 volts. I have one old old NAPA charger that I now use on dead or very low battery but I don't leave it one and 3 of the small battery maintainers to keep them charged. One is for my boat battery to bring it back up to full charge and maintain it (it takes a long time to bring it up), one on my DRW to maintain it's battery because it sits all summer and the last one hard wired into my battery for our trailers generator starting battery. Even the converter in our trailer charges that way but has a 60 amp output when needed but floats at 13.2 when the batteries are charged.

Denny

 

Post a model number or a picture.

 

I think what we're discussing here, what was once called a 'trickle charger' that operates at a fixed voltage/low-amperage (usually around 2.5 amps?) whenever it's plugged in, are now called 'battery tenders' as they try to keep a battery at a specific charge. They aren't really 'smart,' but they are smart enough to kick off when the charge reaches a certain max and kick back on when it reaches a certain min.

Your described battery charger, like almost all multi-amp/multi-voltage battery chargers, will work for charging a dead or low battery. HOWEVER, I would NEVER use that style of battery charger to MAINTAIN a battery's charge long-term. It was never that style's intended purpose, and since the vast majority of this style of chargers do NOT have any way to monitor the charge of a battery, they would likely 'cook' a battery over a long period.

 

Personally I only use AGM charger/maintainers on AGM batteries - all of them are so-called "smart". I'm a fan of the CTEK units myself... I have plenty of flooded cell batteries and use Battery Tender and BatteryMinder brands on those. I also have some really old Sears multi-charge rate units, seldom use them. My wife told me I needed to lock her F150 before putting a charger on it - guess I better research this more, however my CTEK MUS 25000 goes through all the normal functions, ending up in float - I put the + lead on the battery + and the - lead to the engine (looks like the water pump housing).

Interested in following this thread...

 

I'm guilty of derailing several threads on this topic, on this forum and others. It's a pet project of mine, lol

 

You can't use a battery maintainer or charger with the battery cables connected or you will confuse the BMS as you have experienced.

 

We aren't aware of any BMS issues (ignorance is bliss?!), but would attaching directly to the negative battery post, on the battery side of the Hall sensor, keep the BMS happiest without having to disconnect? Or I guess a simple solution would be a battery disconnect. It has to be something the wife would do, and lordy help me if the settings on the truck get lost by doing a disconnect...

 

On my 2020 F150 XLT what all does the BMS system put to sleep, will the test port still have power? I'm asking because because I'm planning on leaving a smart charger attached to the battery for the first 2 months of the 6 months we will be gone for the winter so the Smart Ride module will be in contact with the insurance company until my trial period is up. Then when the Smart Ride is satisfied I will have someone disconnect the battery and charger until April when we get back. I tried to explain to them that the truck will not move after October 4th but it was like talking to a rock.

Denny