As per the instructions, I have the outlet disconnected before mounting the clamps on the battery; positive first, negative second. I plug in the outlet and I get a red test indication even if my battery steadily shows 12.67V for 2 days now. OptiMate 4 Dual Program is the latest version of the multiple award-winning OptiMate 4 - the unique multistage battery optimiser specially designed for modern 12V starter batteries from 2.5 to 50 Amp-hours. With OptiMate 4 Dual Program you can now either charge the battery direct, or select the program to charge via the 12V port on CAN-bus equipped BMW motorcycles (using an optional DIN plug lead). The red wire should be connected to the positive terminal. If you copy and paste the link below you can view the instructions.

From “C.H.” (8/09): “I have to agree with the comments posted (below). The Optimate4 I bought with great expectations has proven to be just another hyped up product skillfully promoted with the aim of thinning your wallet without providing the advertised benefits.When the battery-sensing circuit observes that charge progress is sufficient, the unique ‘verification’ stage engages. The voltage is limited at a lower level, & if sensed necessary, a voltage pulsing action provides further desulfating (and) tops off the charge. When this has been verified, or if after 48 hours from connection the battery has been unable to accept (and) retain adequate charge, the next stage engages. If you bypassed the desulfating mode and left the battery connected to a vehicle, and it gets a failing grade, TecMate points out that it could be getting pulled down by problems in a vehicle’s electrical system that are unrelated to the battery. Voltage retention test: is conducted for 30 minutes during which no charge current is delivered, with 5 possible test results indicating the battery's general state of health. The pre-qualification test can be used to detect batteries that may hold a charge initially, but lose charge overnight.

Personally, the only motorcycle battery charger features I’m really interested in are its ability to keep a maintenance charge and last for years while doing it, because I never let my batteries run down to the point where they need to be raised from the dead anyway. Suitable for all types of rechargeable 12V lead-acid batteries: filler cap types; absorbed glass mat (AGM or "MF"); valve regulated (VRLA); GEL-electrolyte. As simple as 1-2-3: Just connect OptiMate 4 to your battery, the rest is automatic. Electronically protected against user errors. There is no switch, no fuse and there are no sparks. The Optimate 3 will be fine, unless you have a Lithium battery fitted. If this is the case, you will require a Lithium batterycharger. My thanks to American Classic Motors, Zeiglerville, Pennsylvania, for providing the OptiMate4 for testing and stepping up in wanting to actually know if the products they sell really do work.”I just have this feeling that there really aren’t any distinguishing characteristics that make one all that different from the other — beside the fancy cases and LED lights, that is. The instructions warn the owner to connect the charger to the battery first, then plug into the wall. When disconnecting, unplug from the wall first, then remove from the battery.

Charge maintenance: a voltage of 13.6V is delivered for 30 minutes following each voltage retention test, with sufficient current to sustain it against natural self-discharge or drain from permanently active vehicle components or connected accessories (alarm, immobiliser). The voltage retention test and charge maintenance periods continue alternating half-hourly until the battery is disconnected. The test result is updated during each subsequent test. Will I be able to fit this charger to my 2011 harley 48 which has a pre fitted charger lead I'm not sure if it isSAE? January 29, 2018 And I had to keep the manual near the charger so I could keep referring to it to interpret what was happening to the battery. If one wants to maximize battery life, the cycling that Yuasa does is very desirable. Let’s think about this, too: Of all of the manufacturers selling battery maintainers, how many of them actually design, produce, and sell lines of batteries? I count one: Yuasa.

Specifications

And those are about the most respected batteries in the motorcycle industry. Yuasa employs full-time scientists and engineers who fully understand battery chemistry and design, as well as battery charging. To evaluate the Optimate 4, I used a riding lawnmower battery that has been sitting in the lawnmower since April of this year. From “M.G.” (2/09):“I do have a question about the OptiMate 4, and a comment for JTG’s comments in the same article about his charger failures: in rod segments and a sledgehammer (to drive in a new one), plus a bit of sanding on the grounding strap & some dielectric grease, and the problem is normally resolved for another decade-plus.

For neglected batteries, the OptiMate 4 starts the recovery mode, initially limiting the applied voltage at 16V, and if necessary for sulfated batteries, engaging TURBO recovery at a voltage of up to 22V at low current for up to 2 hours, to recover the battery to a condition in which it can accept a normal charge. IDEAL FOR: AGM, GEL & STD 12V batteries from 4 – 60Ah & Lithium (LiFePO4) 12.8/13.2V batteries from 2 – 15Ah

https://static1.squarespace.com/static/58ee35f3e6f2e1f4c4896f44/t/5911dababe6594c7be241cd1/1494342338548/OptiMate+4+Dual+Program+Instructions.pdf The Optimate 4 has several microprocessor controlled stages that analyze, desulfate and charge motorcycle and automobile batteries.