Bosch C3 Battery Charger
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- Vehicle Compatibility: Two Wheeler and passenger cars, Memory function
- Applicable for 6-Volt and 12-Volt car batteries and 2 Wheeler batteries
- Automatic detection of battery types whether 6V or 12V ; Suitable for Lead acid wet, AGM and gel batteries ; No risk of overcharge ; Protection against sparks ; Full protection against short-circuit & reverse polarity
- Ideal for Start/Stop batteries with AGM and EFB technologies
- Trickle charging for optimum battery care. Customer care: 1800 108 1081 ID: firstname.lastname@example.org
- Screw- mountable eyelet cables can be installed directly onto the battery .
- Product doesn’t work on Dead or Defective batteries
- Product will only charge the battery . Charge holding will solely depend on Battery quality / life
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Over heat protection to avoid failure or accident. Suitable for AGM, wet, gel and VRLA batteries. Protection against spark. Short circuit and reverse polarity protection.
From the manufacturer
Your benefits at a glance:
- Mounting hook
- Suitable for Lead acid wet, AGM and gel batteries
- No risk of overcharge
- Protection against sparks
- Full protection against short-circuit & reverse polarity
- One button for ease of use
- Fully automatic charging
- Protection against overheating
Bosch C3 Battery Charger
The Bosch C3 battery charger is an intelligent four-stage automatic battery charger with pulse charging and trickle charging capabilities. Its trickle charging mode enables the charger to monitor and keep the battery at a high level of charge which helps to reduce self-discharge
The C3 is ideal for charging and maintaining lead acid wet, gel, AGM and VRLA / SLA batteries up to 120Ah (12V) / 14Ah (6V). Finally, the Bosch C3 is suitable for many applications including classic cars, modern vehicles, motorcycles, caravans, boats and jet skis.
- 0.8a 6V:1.2 – 14Ah
- 3.8a 12V: 14 – 120Ah
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1. Operation Manual clearly mentions the necessary requirement of 8V threshold meaning that battery's charge should not be below 8V because then it will wrongly recognise the battery as 6V battery (which is what exactly happened in my case).
THIS SHOULD BE MENTIONED BY SELLERS/COMPANY/AMAZON IN THE PRODUCT DESCRIPTION BULLET POINTS RIGHT NEXT TO ITS IMAGES. It is a kind of cheating by giving insufficient info. (there should not be a need to post question for this information, it should be readily and clearly visible) and thus tricking consumers into buying an item.
2. Real use of this charger is only limited to situations when your car doesn't crank but lights, horn etc. seem okay. That is, the charge is not 12V but still above 8V threshold.
3. I discovered a hack to make it work but it required a working 12V car battery for that. And I can say it DOES charge battery up to 12V once battery is detected right.
4. Once the battery was charged (OK LED lit), I realised that the trickle charging option was not working, according to the manual at least. It says the OK light should flicker after a delay of few seconds once the charging is "OK". It can be a wrong info. in the manual or a faulty unit otherwise.
All in all, more often than not, battery is already flat when you know it and C3 hangs you out to dry because of its freaking 8V threshold B.S.
I have purchased this for my Harley Davidson 1200 Custom 2015 model vehicle. Which is having a 12v battery which was low as I dint use it for 2 weeks. There was some power still left but not sufficient enough to start the bike.
I have seen the reviews in Amazon by one of the HOG member and trusted this and bought it.
It was delivered in 16 hours .
After I have removed the side panel and rider seat of my bike I have connected the wires as per the guidance in the manual and switched on the power supply.
I have pressed the Power(Mode) button on the charger only once and it detected the vehicle and voltage and set its charging mode automatically and started charging. Wonderful to see it automatically detecting the Mode (vehicle & voltage) as there are different Modes explained in the manual. I was thinking(worrying) whether to change the mode manually. But it was amazing to watch it functioning automatically.
The indicators on the charger will lit to indicate the state (as mentioned in manual) of charging, Vehicle and Battery type.
I left it four around 8-9 hours but checking it every 2 hours to see whether the charger or battery is heating up. Neither did.
It charged in 9 hours and changed the indicator that the battery is fully charged. As it was already 11pm I have unplugged the wires and left the bike covering it.
Next morning I were eager to see whether the battery is really charged, my bike would start, etc.
I have ignited the engine and pushed the start button. The bike started just like that with in fraction of second.
A happy ending to know the battery is full. I have not used any battery checking equipment but I am sure it is fully charged as per the starting time it took as soon as I pushed the button.
Before adding this product to my cart, I have shortlisted few other local made with definitely good reviews but unbranded. The manufacturer of it was prompt in responding to my query with genuine advise to go for different product of theirs.
But my trust in brands made to choose BOSCH and it is proven again a branded products are trustworthy.
I am sure it will help Sportster HOGs who ride their beast occasionally and wants to keep their bike charged when not used.
I tested this on a flat 12 volt battery that was 5 volt. It's turns out the charger works only when the voltage is about 11v. It took me host a few min to connect the flat battery to a running car to get it to 11v from there on the C3 took over.
Absolutely no issues apart from the Amazon delivery at agent flinging the parcel outside the house and switching off his phone. The parcel was out for 2 days.
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Ich habe mich auf den Test in "Motorrad" verlassen, bei dem das Gerät Testsieger war und angeblich tiefentladene Batterien problemlos laden konnte. Da stellt sich mit die Frage, mit welchem Gerät bzw welchem Testverfahren dort gearbeitet wurde, unter realen Bedingungen mit einem aus dem Handel bezogenen Ladegerät kann es kaum gewesen sein.
adesso sono sicuro di ripartire ad ogni uscita anche dopo un lungo periodo di inattività.
Note: these units were only lightly used once, possibly twice, during the total ownership period. Both were properly stored. Yet both failed inexplicably with a "MODE" button that doesn't operate. You're left staring at a unit that lights up the mode button with a blue LED but no functionality and scratching your head wondering what you might have done wrong to prevent it's proper operation. Then after a lot of wasted time reading reading manuals for the (simple-to-use device) and reading blogs have learned that this is a common issue with the unit. So thanks Bosch for managing to simultaneously leave me stranded, make me feel stupid, and stick me with not one but TWO units that look brand new but don't work.
Startup behavior: When AC power is lost and returns, it powers up in "doing nothing" state. Oops, did you think leaving this thing connected to your battery was gonna keep it maintained? Better remember to trot out to the garage and push the button a few times to restart it! Good luck remembering that after a power blip.
Interface: What exactly are you pushing the button for, anyway? Some LEDs indicate a choice, and change when you push the button, and some LEDs indicate status, and change, presumably, depending on what the battery is doing. They all look identical and are accompanied only by nearly-useless hieroglyphics, though, so plan to re-skim the manual every time you have to interact with the thing. I ended up sticking a piece of tape to mine and writing my own micro-manual on it.
Cord: The inline coupler on the DC cord is obnoxious. It's waterproof, which is nice, and it's not a polarity-death-trap like the common "trailer connector" I've seen on other products, so they were headed in the right direction. But the latch doesn't actually latch, or if it does it releases with just a tug, and sometimes it doesn't release even when you really mash it with your thumb, and heaven forbid you have to use it with gloves. I replaced mine with a pair of Powerpoles because they mate sensibly and I didn't need the waterproofing. Also the cord was too short so I was extending it anyway.
Clips: These are actually pretty sweet, and they're my favorite part of the unit. Ring terminals that couple sensibly onto pretty nice little clips. Definitely a keeper. Shame the rings were too small to fit my battery's posts, so I had to replace them anyway.
I reached out to them by phone and returned some unused Bosch spark plugs and defective Bosch battery charger and Bosch was absolutely excellent! Great customer service and no hassles at all. I was refunded for the full price of the plugs and they sent me a more expensive updated version of the battery charger. For this alone I intend to stick with Bosch.
I've had the chance to use this now multiple times on an AGM ran down to as low as 9v. This Bosch C3 indicated with a red exclamation in that case so I put a volt meter on the battery and confirmed it did indeed charge the battery.
By pressing the center button one can select AGM etc and these functions all work properly.
The unit is small and light weight, but robust. After these trials I see no point in keeping my big heavy charger.
It's a smart charger and so far hasn't let me down in the charging department. However, two this worry/annoy me:
1. You have to press the button for it to do anything. If you loose power for a second, you have to remember to push the button again.
2. The alligator clips are ok, but you basically screw them onto the wire. This wire can therefore be used either as a permanent direct connection to a battery (very handy on a motorcycle) which you can then quick disconnect/reconnect. OR you can use them with the alligator clips. It would have been MUCH better to include two set of wires
3. They use a quick disconnect unlike any other brand so it's not compatible with other chargers.
For these reason, I like my older one better:
It basically comes with a set of terminal I permanently leave attached to my boat and can quickly plug into it. I keep the alligator clips for the trolling motor. Also, it's totally plug and play (and water resistant). I leave it charging on my boat while raining with no worries (although I keep the cord/plug off of the floor). The wiring on the Xtreme Charger are also thicker gauge/ more durable. The Extreme Charger 12 is more expensive but also reconditions batteries by breaking down the crystals that form on the lead plates.
The nice thing about the Bosch though is that I got it for $25 buck and don't move it from the trolling motor so I don't have to worry about weather, quick disconnects, etc.
For the money, the Bosch is a decent charger. Personally, if I could only have one, I would always spend more and get the Extreme Charger 12 instead.