Xtreme 18v Battery

[Princesex Voskamp]

Conditioningand Maintenance: Most chargers look at battery voltage only when it comes to charging. Utilizing highly capable software and microprocessors, we consider the multiple parameters that affect charge acceptance over time and deploy the proper processes to not only fully recharge your battery but also desulfate it for improved performance and maintain it properly for extended periods as needed to extend its usable life.

The secret to our success is our patented pulse waveform, which removes and prevents the buildup of lead-sulfate deposits on battery plates. That primes the battery to accept and store maximum power.

Long trusted by the military, our tech is ideal for anyone who wants to get more out of their equipment. Whether you're looking for a car battery maintainer or a reliable car battery charger, our technology ensures peak performance and longevity for your vehicle's power source.

Founded in 1994, PulseTech is the world leader in recovery, charging, maintenance, and testing of all 12-volt and 24-volt battery systems.

The secret to our success is our patented pulse waveform, which removes and prevents the buildup of lead-sulfate deposits on battery plates. That primes the battery to accept and store maximum power.

For you, this means:

Peak performance and three times more battery lifeMore efficient, resilient, and environmentally responsible equipment Freedom, knowing you have the power to go farther and do more.

Long trusted by the military, our tech is ideal for anyone who wants to get more out of their equipment.

A trickle charger is a device that gradually supplies power to batteries, preventing them from losing charge when not in use. By charging at a slower and steady rate, trickle chargers ensure batteries never become completely dead and can be left connected for an extended period without overcharging. Just plug into an electrical outlet and it will do the rest - maintaining charge levels, preventing sulfate build-up, and ensuring peak performance. Whether it's a 12 volt trickle charger or a 24v trickle charger, it's essential for keeping your batteries in top condition.

We needed some more small chargers and having used Pulse Tech before, that is who we turned to again.

Our ranch has over 30 pieces of equipment that have batteries, so we are well versed in what a good charger is......Pulse Tech is It!

Just another battery charger for the farm vehicles....... Wow was I blown away with this little bugger. In two short weeks it has recharged 3 of my DEAD ones on a few of my "old" cars and has also picked out a dead short in the mower battery. I am very enthusiastic about this Maintainer/charger I can see another purchase much sooner then I was even contemplating!!! 10 Stars!!!! Skip

i bought my jbl xtreme decemeber 2015. my problem is it keeps going on off and on within plays even on full charge. recently however even on full charge it doesn't last an hour. I've been to too many forums and i haven't seen any1 share the same problem as me. am i alone?

I was unable to find a replacement, or a suitable Lithium Polymer alternative, so I decided to give the 18650s a go like sebatianmeyer1 recommended. I am attempting to use the factory BMS board, and will post my results as a guide for others.

I am using the original BMS board, and Sony VTC6 3000mah batteries that I purchased from imrbatteries.com (there is a lot of concern with fake Sony 18650 batteries and they seem legitimate). The unit now charges and functions great! Haven't tested runtime of the batteries yet because of my issue below.

I made a major mistake - to get the batteries to fit after my hefty coating of electrical tape, I had the brilliant idea to remove the firewall from the clear plastic cover thinking it was for water resistance only - big mistake!!! Do not do this, as it also seals the air for the woofers to function correctly. Air now flows out the ports and the bass muffles. I put a red line on the image below for reference. I am now figuring out a way to seal it back up, thinking of pumping silicone or hot glue in there..

hello could you help me, it's correct to put the batteries in parallel, the architecture connecting 3.7 parallel with 3.7 only give 3.7 v and double current and serial with the same arrange give a 7.4 v and double current, or both batteries in series give 14.8 volts, what is the correct arrange, sorry with my bad english.

The way I did it - I made two "packs" of batteries in parallel (3.7v), then the BMS board puts them in a series using the BM pads for a final voltage of 7.4v. Each pack consists of two 18650 batteries in parallel, so each pack has a voltage of 3.7v. When you connect the two packs to the board like I illustrated, you end up with 7.4v because the board connects the two packs in a series.

After trying to replace the JBL original battery with lithium ion 18650 a size problem occur. 18650 size is 18 X 65 mm. The original JBL battery is 146 X 34.5 mm. This means that the length is OK but, width of two 18650 size is 1.5 mm bigger that the JBL original GSP0931134. The battery compartment of Xtreme don't allow this increase of 1.5mm in width size. Apparently you have solved this by removing plastic wall but this result in acoustic problem with bass.

They would fit if you don't put a lot of tape/shrink wrap on them. I repaired the wall using some flexible plastic (like a dvd case or something similar) cut to size and siliconed in to place. I would recommend not cutting the wall if you don't have to. Because the 18650 are round, they fit ok even with 1.5mm difference. The door would close completely before I put too much electrical tape on the batteries!

If anyone is still looking for help I decided to do some digging as well. I didn't want to rig up a bank of 18650 cells and resisters etc lol. So I found a battery that was similar in dimensions and hoped would fit. I got the battery and it does barely fit. It is only 4400mah (8800mah @ 3.7V) which is almost the clamed OEM battery in the Xtreme.

I wired the colors up the same and left one red off from the Xtreme. So far so good. I'm getting roughly 10-12 hours of playtime and its charging fully and shutting off automatically. My Xtreme used to charge forever and never stop and it also would only last an hour off of a charge. Anyways, I love JBL but when I contacted them they basically told me there's nothing they could do as I'm from Canada which is absurd.

Thanks. I did it this way as well, using the same battery. It looks like the new pack is made from four 18mm diameter 18650 2200mAh cells (2S2P). It's slightly shorter than stock pack, but stock pack also has some useless space built into the end so actual cell volume is not all that different. The battery leads are quite a bit smaller than stock and there's only one red wire so load on that one will be higher, but it seems to get the job done just fine. I added a wrap and a half of tan stretchy medical bandage wrap (from Walgreens) to the cell to provide padding, and provide some grip so it wouldn't slide around in the battery space.

One thing I don't see mentioned in most of these teardown vids is that there are fine rubber seals around edges of the clear battery cover, and around the edges of the passive radiator cover. Make sure those strips are fully seated in their slots before you reassemble. This unit is meant to be totally air tight.

Hello guys. Maybe someone of you had problem with soldering 2of4 bms plates. So as you see i'm too had this problem and i solved it. I want to share my solution. So after few hours try soldering my wires i got idea. I took female connectors and i made some kind space which i can soldering and it will be

to conduct electricity. I it works. My battery again is charging 3.5 hours. I add pictures with my solution this problem. So about battery which i used it was 4xSONY US18650VTC5 2600mAh. At the pictures you will see about what i'm talking .

And rest you have on my pictures, but you have to be carefull during grind this connector. It is realy gnetle. I destroyed 10 of this connectors before i make 2 proper. And to make proper shape of this connector i used thin screwdriver.

That's the same issue I'm having, Dave. Not sure how you solved it exactly. Did you open up the female connector and cut pieces of, before bending it around the BMS? I've had the same issue with the soldering. Today I was sanding down the connection and was able to solder it, but without succes. The is no power coming from the BMS connector. Not sure what is wrong. Could still be the soldering.

Could I have damaged the BMS by soldering too long and making it too hot? If so, how can I solve this? Can I buy a new BMS? The mentioned option of adding a 10 Ohm resistor, doesn't seem a very safe option, or am I wrong? Can I measure something on the BMS to test it?

hmm, nobody? Then I've probably now ruined my JBL from a 30 min battery operated model to a 0 min operated model :(. Anything else I can try? Where can I find a replacement OEM battery? Does anybody have a direct link to Aliexpress or other source?

Thanks Dave for adding more details. As I mentioned in another comment (above today), I was able to solder the wires to the BMS, but the trick was to sand down the connectors in the BMS really well and sand down the tip of the solder gun. That did the trick.

I had the same problem, sent it back for repairs, still have the same problem and when I called JBL they were extremely rude and told me my warranty had just expired and to send it back again and they would fix it this time for a charge. I argued with them I just sent it back under warranty and they responded too bad and hung up on me. It worked fine when I bought it. Now I never get a full charge because the lights are all messed up. Last JBL product I buy. 250.00 down the tubes.

How do I know if my JBL speaker is fake ? Because all the tips I did and none of them work so how do I know when it is charged or not because the lights don't go down and when i press the volume button while not playing music it does nothing

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