# help finding a GOOD battery charger preferably under $40 Status Not open for further replies. #### budget minded ##### Member i tried keyword searching battery chargers here for any discussions about good ones to buy, but found nothing i'm trying to buy a charger for 12v batteries, and am a bit overwhelmed as reading reviews for ALL of them, issues come up that make each one sound useless eg. - won't fully charge to 13.6v - can't handle high amperage - charges, then discharges - for maintaining only... and so on. i'm looking for a charger that can SAFELY handle charging up to FOUR 12v x 18aH deep cycle batteries in parallel for a bicycle trailer sound system. i'll be starting out with just one battery though. i want a charger that can FULLY charge 72aH without frying or discharging my batteries. i don't really need a maintainer as i intend to disconnect the charger within 1 day of it fully charging my system. i'd PREFER a charger that can trickle charge instead of speed charge the batteries. basically, i just want a charger that gets the job done without acting up. i was looking at various schumacher chargers which seem to have good ratings, but every one of those also has horror stories, and especially now, just to get up and running, i was considering this cheap$13 1.2 amp (trickle) charger

https://www.amazon.com/AURELIO-TECH...00QI7BO22/ref=cm_cr_arp_d_product_top?ie=UTF8
as it has no horror stories attached to it, and it's cheap enough that i could upgrade to a premium ($50+) charger later and keep this as a backup as finances allow after completing my final system which still needs a sub and 2-3 more batteries. any help that anyone has to offer on affordable chargers that are a solid buy, or ones to avoid like the plague is appreciated. i never thought buying a battery charger could be such a gamble. my grandfather had a basic charger back in the 70s, long before "smart chargers" that he probably bought for$20 and had for years with no problems. that's all i'm looking for, a simple cheap charger that doesn't break or destroy my batteries. what's so complicated about that? i don't care if it has a short cord or any other similar kinds of minor quibbles. i can park my trailer right next to an outlet. all i care about is that the charger is functional and dependable. being able to charge 72 amps in no more than 2 days would be nice too.

thanks in advance to anyone who can help me get the battery i just ordered up and running at full capacity without wasting money on useless junk.

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#### k7elp60

##### Active Member
Here is a website :http://www.powerstream.com/. They have quite a selection, from reading you post perhaps the PST-A200 12A charger might fit the bill.
If what you find there is not suitable, it is possible to build one, I have built many 12v lead-acid chargers in the past 15 to 20 years so I may be able to help you.

#### budget minded

##### Member
no, i don't think building is an option. i'm not technically oriented. i can maybe read a schematic well enough to build a passive speaker crossover or make an LED string, but that's about my limit. i can wire components up, but not much more than that. i'd rather just buy a charger. i'll take a look at that link and site.

nope. not liking those at all... no alligator clips. i want a charger that's ready to use out of the box.

UPDATE:

#### budget minded

##### Member
AGM batteries are a temporary stopgap measure to get rolling ASAP. they aren't what i intend to use forever. when my income improves, i will step up to lighter, but far more expensive, li-poly batteries.

as to 72aH batteries, they are simply way too big! this is a bicycle trailer afterall, so real estate is at a premium. i can lay 4 x ML18-12 on their sides in a bike trailer for a depth of only about 3 inches, and spread the batteries out for better use of space under my trailer. a huge single battery would eat up a lot of vertical space as well as unused horizontal space. i'll likely be paying more per amp/watt, but gain a lot in mounting flexibility. i've given this issue literally YEARS of thought and started a single battery system years ago,

and finding space for the battery proved to be a very annoying space wasting challenge.

i pretty much had EVERYTHING i needed to complete the system i had to abandon once i realized far to late, there was no way i was going to be able to get it out of my second story apartment because of balcony rails.

it's REALLY a shame because those amps were AWSOME! they were class A/B, but those white discs on top of them were electric blue plasma (borg) displays which had a very wide range of displays from a few lightning bolts to complex spider webs depending on the song, and i'm guessing its frequency profile being played at any given time. i REALLY hated selling those before i ever used them. the amps had a very fun, slightly warm, PRAT stomping eager/playful sound quality perfect for dance tunes and the displays were super-disco. i ended up giving the battery, charger and 10" goldwood poly wedge sub away without ever really using that either. i got a really good (i think $80 each) deal on the amps on closeout at sonicelectronix and as you can see in the pic, they didn't quite match in color. the one on the left was a neutral titanium grey while the one on the right was a slightly reddish and darker sunglasses tint. i sold those along with 3 of 4 hifonics (aka MB quart) 12" subs (back when they still had cool looking chrome trim rings) and boxes i had. i WISH i had the last sub to use now, but it's in storage in another state. i REALLY wish i never sold the amps. i found these cool inner/outer "crochet stretcher rings" that were just the right size to poke the displays through the chrome sequined fabric you can see in the background i planned to use as an outer shell. i really miss the NHT superzeros i sold too. what they lacked in bass as well as treble speed and extension they more than made up for in imaging and total lack of box resonance neutrality. i've owned speakers with better drivers, but they all sucked with woody sounding & larger 5/8" MDF boxes with resonances that drove me crazy. DO NOT get me started on bass reflex! just don't! LOL Last edited: #### k7elp60 ##### Active Member interesting #### Mosaic ##### Well-Known Member #### tcmtech ##### Banned Most Helpful Member interesting Like watching the mentally changed compete in a Jeopardy match. It's interesting for totally different reasons than any normal match. #### budget minded ##### Member i'm DIY as far as engineering goes, but nearly clueless when it comes to electronics. as to li-poly, i don't like the idea of used batteries, but am planning on going that route next year after my income improves, as well as building a mold for carbon fiber lined with fiber and/or hemp glass. right now, i'm just trying to get rolling asap and as cheap as possible, and it's already too late as i just bought my 1st starter 12v battery to get rolling without a sub. i might not use anything from the system i'm building now in the 4x12 one i'll build next year except maybe the amp and circuit breaker. when i go the lithium route, it will be using top of the line panasonic cells. if you're not following the "system thread", the system i'm building now will use a pair of proel 8 inch 96dB efficient mini-DJ speakers that actually sound really nice except for their lack of bass. i got them on closeout at MCM after researching their sound for just$100 when the pair lists for $500 and uses celestion drivers including a titanium waveguide tweeter. as the air motion tweeters i wanted to use, and will likely use in the final system are$70 each, i figured the deal i was getting on the proels was too good to pass up as i originally intended to start with a lower power sure amp and just those.

the sub i'll be starting with is a $22 MCM 15 inch 4 ohm rated at 92dB -3dB @ 50Hz poly with a cool looking inverted dustcap and rubber surrounds mounted in a 1.9 cubic foot sealed box i can get up the street for$42 with a system Q of .68.

the amp i'm starting with is a 4 channel class D planet audio (boss) unit that theoretically i can 2x100+ & 1x600 biamp with, without having to deal with high voltage class D issues.

gotta go, or i'll be late to work

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#### k7elp60

##### Active Member
Budget Minded, I have a 12V 5A charger that works very well. I will sell it to you for \$40.00 plus shipping.
I can send you pictures if you are interested.

#### budget minded

##### Member
i'm not a fan of unknown quantities. what exactly makes that charger better than, say, a schumacher i could get new for the same price or less? (and please... use something resembling plain english LOL my understanding of electronics and especially the math & circuit nuances behind them is very limited. i couldn't tell you what a diode does)

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#### k7elp60

##### Active Member
i'm not a fan of unknown quantities. what exactly makes that charger better than, say, a schumacher i could get new for the same price or less? (and please... use something resembling plain english LOL my understanding of electronics and especially the math & circuit nuances behind them is very limited. i couldn't tell you what a diode does)
In the simplest terms and plain english that I can use here is what the charger is: It will safely charge 18AH AGM, Gel-Cel and automobile batteries. It has two meters on the front panel, a voltmeter that shows the charge voltage, and an ammeter that shows the charge current. It was built in the old style of a metal case and a power transformer. It weighs approximately 25 pounds, and has alligator clips the same shape of the two pictures you posted earlier.
I'm sorry you don't understand the terms that myself and the other people have posted answers to your questions. by by

#### budget minded

##### Member
that's why i'm here, to gain understanding and knowledge where i'm lacking and share what i do know about other topics, but when you use the same vocabulary as the majority of your peers here, it sounds like chinese to me. my mind understand spatial, materials & creative problems better than abstract & mathematical ones. it's a lot easier for me to wrap my head around, say, load bearing in a structure intuitively than it is to quote the math behind it. electronics have "spooky behaviors" i find difficult to model in me head beyond the basics.

give me a problem in plain english, explain the variables and name assets, and i'm really good at finding solutions, but i have to understand it at the underlying form level. it's hard to model the complex interactions in a circuit for me, just as it's probably hard for you to understand how every organ and cell structure in a human body interact to produce the whole and your understanding of individual organs is likely comparable to my understanding of electronic components. complex electronics just aren't my thing but i'll run circles around a crowd in more basic problem solving as i have no boxes to think within whatsoever other than the variables that can't be exceeded.

back to the purpose of this thread

i need a charger that can do more than just 18 amps too. i want to be able to charge 4x 18aH batteries in parallel instead of having to charge each one one at a time. so far, i've gotten absolutely nowhere other than having to gamble on a charger that 1 in 20 people have had nothing but problems with. as complex as the are, TVs seem a lot safer investments.

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