Battery Tender question, pos or neg first? - LotusTalk

bluejae · 08-20-2009, 12:49 PM

i read the manual my Battery Tender Junior 12V came with and I was a little confused on which side I should connect first. It was talking about positive ground, negative ground and I don't know which one to follow.

Noel · 08-20-2009, 12:52 PM

I always connect positive first.

waydui · 08-20-2009, 12:58 PM

Quote:

Originally Posted by Noel

I always connect positive first.

+1.

FWIW, mine came with a permanently installed wire harness that connects the two wires from the battery to a snap plug connection. I only have to plug it in. Very quick hookup.

Regards,
Wayne

TheViper · 08-20-2009, 12:59 PM

+1 First red to battery positive, second, black to a chassis ground ( if it is an AGM battery you can connect it directly to the battery as there are no flammable gases) BTW this unit has reverse polarity protection.
Michael

JungleJim · 08-20-2009, 01:04 PM

The best battery charger now on the market is the Tecmate-Optimate 4. Sealed, lots of indicators and features. A really intelligent charger. I am getting rid of my Battery Tender.

bluejae · 08-20-2009, 02:00 PM

Quote:

Originally Posted by TheViper

+1 First red to battery positive, second, black to a chassis ground ( if it is an AGM battery you can connect it directly to the battery as there are no flammable gases) BTW this unit has reverse polarity protection.
Michael

i think i have the pc625, so can i connect directly to the positive and then the negative posts and plug the battery tender in?

TheViper · 08-20-2009, 02:03 PM

Yep

Quote:

Originally Posted by bluejae

i think i have the pc625, so can i connect directly to the positive and then the negative posts and plug the battery tender in?

kestrel74 · 08-20-2009, 02:05 PM

Pretty sure it's + ....but I'm not......positive

spectre · 08-20-2009, 02:13 PM

If its battery tender the actual brand...it doesn't matter + or - as it has a smart feature to take care of it for you. Just hook it up...

TheViper · 08-20-2009, 02:19 PM

Actually, it really does matter, otherwise it won't work. It simply has reverse polarity protection so that if it is connected incorrectly, in reverse, it won't damage the battery or the charger

.
Michael

Quote:

Originally Posted by spectre

If its battery tender the actual brand...it doesn't matter + or - as it has a smart feature to take care of it for you. Just hook it up...

bluejae · 08-20-2009, 02:36 PM

thanks everyone. positive first

Gizmo3000 · 08-20-2009, 02:51 PM

..right into the Cigarette lighter for me

(just in case you hadn't considered that option, it's quite handy)

spectre · 08-20-2009, 03:19 PM

Quote:

Originally Posted by TheViper

Actually, it really does matter, otherwise it won't work. It simply has reverse polarity protection so that if it is connected incorrectly, in reverse, it won't damage the battery or the charger

.
Michael

Yes, I said that wrong. You need positive to positive and negative to negative but you do not need to put the positive on first. If you have a battery tender junior or plus.

SPECIAL FEATURES: The Battery Tender ® Junior and Plus
Chargers have the following special features:
SPARKPROOF: The battery charger DC output leads, either ring
terminals or alligator clips must be connected to a battery before an output
voltage is developed by the battery charger.
SHORT CIRCUIT PROTECTION: The battery charger can sustain a
short circuit connection directly across its DC output terminals indefinitely
without any risk of either electric shock or excessive heat.
REVERSE POLARITY PROTECTION: The battery charger is
protected internally against any damage due to the DC output leads being
connected to the opposite polarity battery post. No damage will result to either the battery or the battery charger.

goldengatehornet · 08-20-2009, 04:52 PM

Quote:

Originally Posted by Noel

I always connect positive first.

+1
When you hook up the ground last, there is less chance of arcing. In fact, don't connect that ground clamp to the battery, but to something else on the car that is a metal ground. I have personally seen a car battery explode as the arc was created just above the battery. An invisible hydrogen cloud was there, created from the battery chemistry. The top of the battery lifted, exposing the sulfuric acid. If connecting to a free standing battery, hook up both clamps before plugging in the charger.

TheViper · 08-20-2009, 05:15 PM

Actually, this is only true with flooded cell batteries, with AGM's, no gas is expelled, therefore there is no risk of an explosion.
Michael

Quote:

Originally Posted by goldengatehornet

+1
When you hook up the ground last, there is less chance of arcing. In fact, don't connect that ground clamp to the battery, but to something else on the car that is a metal ground. I have personally seen a car battery explode as the arc was created just above the battery. An invisible hydrogen cloud was there, created from the battery chemistry. The top of the battery lifted, exposing the sulfuric acid. If connecting to a free standing battery, hook up both clamps before plugging in the charger.

08-20-2009, 12:49 PM	#1 (permalink)
bluejae Registered User Join Date: Jun 2005 Posts: 2,078	Battery Tender question, pos or neg first? i read the manual my Battery Tender Junior 12V came with and I was a little confused on which side I should connect first. It was talking about positive ground, negative ground and I don't know which one to follow. __________________ KG Exige Delivered 5-9-2006 POLL:check for scratches "in" your headlights Excessive tire wear? It may be your alignment My Example Hiro's Example codymac's Example to be installed: stebel horn, fumoto valve current mods: arqray twin muffler, itg intake, 3M film full wrap and full rockers by X-Perts, rear lotus letters removed, locking gas cap, CF Mirror Covers, CF Side Scoops, black lotus nose/wheel badges future mods:wheels, forced induction

08-20-2009, 12:59 PM	#4 (permalink)
TheViper Alarmed & Dangerous Join Date: Jul 2005 Location: Boca Raton FL Posts: 3,205	+1 First red to battery positive, second, black to a chassis ground ( if it is an AGM battery you can connect it directly to the battery as there are no flammable gases) BTW this unit has reverse polarity protection. Michael __________________ Cobra OEM - Alarm, Immobilizer, CDL Emergency Override with warranty Additional Emergency Touch Keys - see link above Brand New Cobra Alarm Remote with warranty Cobra Remote Key Fob Strap Cobra Window Closing Module - Add to your existing Cobra alarm 3 Piece Front Clam Protection Kit with Center Bumper Undertray Removal Tool INFORMATION Improved AC & Heating System Battery Choices & Information Remote Key Fob, Alarm & Immobilizer Programming Light Bulb Conversions 2005

08-20-2009, 01:04 PM	#5 (permalink)
JungleJim Left Lane Assasin Join Date: Apr 2009 Location: Norwalk, CT Posts: 122 Images: 12	The best battery charger now on the market is the Tecmate-Optimate 4. Sealed, lots of indicators and features. A really intelligent charger. I am getting rid of my Battery Tender. __________________ 2007 Exige-All Black and Mean, Factory TouringPak/TrackPak/StarShield/LSD/TractionControl/iPodDock. All stock but not for long. v = square root ((2 * e) / m)

08-20-2009, 02:05 PM	#8 (permalink)
kestrel74 G-200 Driver Join Date: Jun 2004 Location: North of Detroit; Watkins Glen, NY Posts: 9,312	Pretty sure it's + ....but I'm not......positive __________________ 74 Europa Zetec TC Special 3614R Elise #2292 / Chrome Orange !! / Starshield / Nitron Sport SA / RTDbrace / Uprights machined / Down Low rails / ChaseCam / V1 / SS lines w/ R4-S "My daily driver does .85 Mach" " I started flying when Sex was safe and Hang Gliding was dangerous " BUY My Europa ! http://www.lotustalk.com/forums/f94/...pa-sale-43829/

08-20-2009, 02:13 PM	#9 (permalink)
spectre the designer Join Date: Nov 2005 Location: Ohio Posts: 768	If its battery tender the actual brand...it doesn't matter + or - as it has a smart feature to take care of it for you. Just hook it up... __________________ 2008 Exige S 240 For Sale: 2005 stock shifter console and change holder. PM if your interested.

08-20-2009, 12:52 PM	#2 (permalink)
Noel Exige Cup 255 Join Date: Apr 2007 Location: 33.87°S 151.21°E Car: ロータス MKII エキシージ Type: Komo-Tec S300 Posts: 329	I always connect positive first.

08-20-2009, 02:36 PM	#11 (permalink)
bluejae Registered User Join Date: Jun 2005 Posts: 2,078	thanks everyone. positive first __________________ KG Exige Delivered 5-9-2006 POLL:check for scratches "in" your headlights Excessive tire wear? It may be your alignment My Example Hiro's Example codymac's Example to be installed: stebel horn, fumoto valve current mods: arqray twin muffler, itg intake, 3M film full wrap and full rockers by X-Perts, rear lotus letters removed, locking gas cap, CF Mirror Covers, CF Side Scoops, black lotus nose/wheel badges future mods:wheels, forced induction

08-20-2009, 02:51 PM	#12 (permalink)
Gizmo3000 Register Abuser Join Date: Feb 2007 Location: Sherman Oaks Posts: 972	..right into the Cigarette lighter for me (just in case you hadn't considered that option, it's quite handy) __________________ 2005 Starlight Black Elise, -hardtop/touring/black interior/sector111 carpet buttons! 2008 Infiniti G37-S 1991 300ZX 2+2 1974 MGB Roadster

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