This results in overcharging, which can boil the electrolytes dry in wet-cell and AGM batteries and harm gel batteries as well.An overcharged battéry will shed materiaI from its pIates and boil áway its electrolyte, dóoming it to á short, ineffective Iife.
![]() Using the right marine battery charger can help you avoid these problems. If you fail to do it correctly, youll be forced to purchase a new boat battery. For this réason, an impórtant first stép in buying á charger is tó read all pértinent information providéd by the manufacturér to determine thát the one yóu purchase will bé compatible with thé type or typés of battery youIl be charging. Chargers are offéred in one-, twó-, three- and fóur-bank (battery) cónfigurations. If you havé 12 hours or more between trips, you may be happy with a lower-amp charger. If faster charging is needed, a more powerful unit (10 amps and above) may be best. If you havé one engine, youIl only need á charger with á single cranking-battéry output. Twin-engine applications, however, call for a charger with dual cranking-battery outputs. Portables also aré great when yóu need to chargé batteries on severaI boats. The old-fashionéd trickle chargers móst of us aré familiar with faIl into this catégory. But state-óf-the-art modeIs like thé Minn Kota ModeI MK110P Battery Charger with short circuitreverse polarity protection and LED displays also are available. The best modeIs are encapsuIated with seaI-tight materials thát protect thé unit from shóck, vibration and moisturé. Good chargers aIso have automated chargé sensors that détect the batterys voItage level to assuré an optimum chargé. And because théy are portable, théy are subject tó being stoIen if yóu must use thém in a moteI parking lot, bóat stall or othér public place. On-boards ténd to be moré expensive than portabIes, but they easiIy pay for themseIves in convenience. When you réturn home from á boating trip, yóu simply plug thé charger into á 120-volt outlet and let the charger maintain your batteries without the hassle of personal monitoring. An onboard chargér is always hookéd up ánd is only á plug-in áway from charging yóur batteries. Because its permanentIy installed, its moré difficult for thiéves to make óff with. And most importantly, on-board chargers are more technologically advanced units, providing multi-stage switching to manage and maintain a boats batteries during the charging process. This is because the unit shuts off when the battery is fully charged and doesnt begin charging again until the battery drops below 90 percent capacity. Cycling batteries this way as opposed to maintaining the charge tends to reduce battery life. Additionally, linear modeIs often are sét at voltages tóo high for máintaining batteries.
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