The TecMate OptiMate O-105 Dual USB Port Charger is likely to become an indispensable piece of kit for motorcyclists.
It plugs into a Euro-style DIN power outlet (ISO 4165) on your bike.
These are the smaller or narrower style outlets used by BMW and made by Powerlet, Hella, Merit, BIKE, etc.
The OptiMate O-105 includes dual USB-A ports (front and bottom) and a healthy 3.3A charging capacity.
It will also automatically shut off in 3 hours and it includes autosensing to protect against unintended discharge of the battery.
With all that, what’s not to like about this small and very portable accessory outlet charger?
The fact that it is small and portable and can be easily moved from motorcycle to motorcycle, is also its only real weakness (of a sort).
It can be easily “borrowed” if mounted in a conspicuous spot or left unattended on the bike.
But having to keep it close at hand or locked up when not in use is a small price to pay for its versatility and performance.
With a reasonable list price of around $25.00 and a three-year product replacement warranty, the Optimate O-105 dual port charger is an excellent product and investing in one or more is well worth the dinero.
TecMate is the company known for the OptiMate motorcycle battery chargers and other accessories, which are well known and respected within the Powersports community.
Some of this is described in the webBikeWorld Motobatt SAE-to-DIN converter review; in general, the DIN outlet is more robust (electrically and physically) and better suited for motorcycle use.
The OptiMate O-105 charger utilizes the 12 mm male plug ISO 4165 interface, so it will connect to any compatible DIN-type motorcycle power socket utilizing the same interface standard.
This power interface is slowly becoming the de facto standard on many motorcycles and it is extremely popular with motorcyclists who like its size, versatility, functionality and output characteristics.
The OptiMate O-105
With dual USB-A ports, the OptiMate O-105 is a 3300mA fast charger that includes a couple of features you won’t find in the no-name brands.
It includes a battery protection feature.
And it also has an automatic off capability that kicks in three hours after the engine is stopped or if the battery voltage drops below 12.3V, thanks to its built-in sensing/monitoring electronics.
The plug that fits into the DIN outlet is located on the back of the O-105 housing.
It sits at 90 degrees and once it’s plugged into the DIN port, the O-105 has a very low profile, which is handy.
O-105 Dual USB Ports
One of the two USB ports on the O-105 is mounted in the front and the second is mounted on the bottom.
Both include silicone sealing grommets and integrated tether plugs to keep the elements out of the USB ports when nothing is connected.
This separate port layout provides lots of versatility in attaching cables for charging devices, no matter where or in what orientation the O-105 is mounted.
O-105 Power Requirements
Input requirements for the O-105 input are simple: it connects to the DIN socket, which will have standard 12.3V to 16V DC power coming from the motorcycle’s electrical system.
The O-105 has a maximum of 3300mA at 5V for accessories that are connected to it via the USB ports.
Automatic Battery Protection Feature
The automatic protection feature is based on two safeguard conditions: voltage and time.
The O-105 will automatically shut down if battery voltage falls below a minimum of 12.3V or a maximum of three hours after the engine is stopped.
Note, however, that the DIN outlet on the motorcycle is usually connected to a switched circuit, so the three-hour timeline isn’t applicable.
But even if the O-105 is plugged into an always-on DIN outlet (with wiring direct to the battery or a circuit from a power distribution module), the O-105 shuts off at the three hour mark, as advertised.
Or does it? Some of the test data seems to indicate otherwise; see the following section.
Like most of the OptiMate USB accessory products, the O-105 comes with a three-year product replacement warranty.
Function and Performance
Plug in the O-105 to an OE or accessory DIN outlet on the bike, connect one or two or more accessories via the USB ports for charging using an appropriate USB cable and away you go.
The O-105 is small, portable and versatile, and it can be easily moved between motorcycles at any time, or keep one mounted or stashed away on each machine.
Some motorcycles have a DIN outlet port on the dashboard (Suzuki V-Strom 1000) and some have it on the right side of the bike, below the seat.
Either location makes it easy to access the O-105 and any attached accessories when riding and the O-105 can be easily removed when the bike is parked.
Also on some motorcycles, such as the newer BMWs, the ignition can be turned on but the O-105 will not be activated until the engine is running.
At this point, the small (bright) blue LED on the O-105 flashes once as a power good/received confirmation.
When the engine and ignition is turned off, the LED goes into a once-per-second on/off pulse and the 5V charging capability continues until power to the circuit is completely switched off.
On some motorcycles, this off state may be instantaneous.
But with some on-board or after-market power distribution systems, a fixed or programmable time delay may keep the O-105 active until power to that circuit is switched off via the motorcycle’s electrical system CPU.
On any of the pre-2005 Beemers or other non-CAN bus motorcycles, unless a programmed circuit from a power distribution system was used, the O-105 would shut down immediately once the engine/ignition was turned off.
The O-105 sits vertically in the DIN outlet, allowing direct access to the facing USB port and the bottom USB port as well, although the rear port is a tighter fit with a sharp angle…but doable.
While my observations relevant to the BMW motorcycles are interesting, by themselves they are not negatives and do not detract from the overall performance of the O-105.
Cross-platform testing and use reveals that when monitored voltage falls to around 12.3V, the O-105 shuts itself down.
This prevents unintended discharge of the main power supply — that being your battery.
You do want to get home, right?
I have also confirmed that the O-105 shuts itself down after three-hours, no matter if devices are connected and power is being supplied or not and that’s another reassuring feature.
With 3300mA available, the O-105 capably charges one, two and even three small portable devices, including quick charging service for those accessories or devices with a larger appetite and ability to consume.
One needs to remember though that while the O-105 has some built-in smarts, it doesn’t dynamically manage distribution of power through the USB ports (as far as we know).
As such, connecting a power-hungry device might limit or reduce the supply to other connected devices.
One configuration I used on the R 1200 R is a two-way splitter coming off one of the O-105 ports that was powering a Garmin VIRB Elite and Sony HDR-AZ1 action camera.
The second USB port was keeping a Lumia 950XL Windows 10 Mobile (fast charge capable) device topped up.
We have two of the O-105 chargers for this review.
And while neither has “gone walkabout” when left unattended, I will purchase a couple more so I’ll have one for each of my motorcycles.
Less a possible penchant to go missing in action, and in acknowledging the observations I experienced regarding their use on the newer BMWs, there isn’t much else to comment on regarding the O-105 chargers.
They work, as advertised.
Subject to any electrical output issues or physical damage, the O-105 chargers should be around for a long time; providing a great return for a minimal investment.