The battery in your car should be fine for 2 or 4 weeks.
If you want, you can go to Walmart to get a Battery Tender. Or search "flooded battery maintainers" on Amazon.com. I have one myself, but I never used it.
You are welcome. The battery in your car is called
SLA (Sealed Lead Acid) battery. An SLA battery typically loses 5% stored energy per month depending on ambient temperature. The higher the temperature, the quicker it loses its energy. Unless you know there is an leak issue or your battery is very old, you don't need to worry about it.
You don't need another charger to charge NOCO GB40. It comes with an USB cable which you can connect to any USB source, including USB in your car to charge GB40 (one full charge can jump start up to 6 cars -
It has been many years but still works great (keep charging for many months). My current SUV has dual battery but I still keep the NOCO GB40 in my vehicle in case needed or sometimes for helping others (I don't like to connect my battery to jump start other's cars).
BMS = Battery Management System, which can prevent it from being short/incorrect connection, etc.
is relatively new. You may lose computer settings if you disconnect it. In autoshops, they power your system through ODB-2 port while replacing your battery. Again, parking for a month is nothing.
请教各位高手：请推荐什么牌子的蓄电池的充电器好些？
请教各位高手：现在防疫，很少出门，我的Toyota Corolla在家停两个星期后，再开可以发动起来吗？在家停一个月，再开可以发动起来吗？是不是要去买一个给蓄电池的充电器，作为备用啊？请推荐什么牌子的蓄电池的充电器好些？非常谢谢！
If you want, you can go to Walmart to get a Battery Tender. Or search "flooded battery maintainers" on Amazon.com. I have one myself, but I never used it.
Best regards,
Alex
Alex：非常谢谢
good luck！
SLA (Sealed Lead Acid) battery. An SLA battery typically loses 5% stored energy per month depending on ambient temperature. The higher the temperature, the quicker it loses its energy. Unless you know there is an leak issue or your battery is very old, you don't need to worry about it.
Best regards,
Alex
请教：“我也挂了一个充电器，充电器上的绿灯看着就踏实”，是什么意思？我想充电器，应该是在打不着火的时候，用充电器给电池冲一会儿电，（半小时）然后再发动打着火了，就可以把充电器收起来了？充电器是110V的吧？到底怎么使用充电器呢？谢谢告诉我。
NOCO Boost Plus GB40 1000 Amp 12-Volt UltraSafe Portable Lithium Car Battery Jump Starter Pack For Up To 6-Liter Gasoline And 3-Liter Diesel Engines
st.paul ：你好！非常谢谢推荐！工作原理是不是这是一块锂电池？用这块锂电池快速点火，让汽车发动之后，取下这块锂电池之后，就可以开车出行了，是吗？
平时这块锂电池可以在家里用110V来为这块锂电池充电？
上次因了要换Infiniti的dashboard 把电池断开了一两个星期，结果完全没有ignition. Error : ECU lost sum.折腾了一大通才救活了过来。
断个几天应该没事。
You don't need another charger to charge NOCO GB40. It comes with an USB cable which you can connect to any USB source, including USB in your car to charge GB40 (one full charge can jump start up to 6 cars -
I have an earlier version of this one:
https://www.amazon.com/NOCO-GB40-UltraSafe-Lithium-Starter/dp/B015TKUPIC/ref=sr_1_1_sspa?keywords=noco+GB40&qid=1585759805&sr=8-1-spons&psc=1&smid=A1JAHKBJSJLE37&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyTE8yWjJRQVBPU0ZIJmVuY3J5cHRlZElkPUEwMzc2NjQzVlQ1SE5FTllYM05VJmVuY3J5cHRlZEFkSWQ9QTAzMTkwMTlaMVdKNUxRRUZNTVAmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
It has been many years but still works great (keep charging for many months). My current SUV has dual battery but I still keep the NOCO GB40 in my vehicle in case needed or sometimes for helping others (I don't like to connect my battery to jump start other's cars).
BMS = Battery Management System, which can prevent it from being short/incorrect connection, etc.
st.paul ：非常谢谢你的热心助人！还想确认一下：也就是说我的iphone充电器上的USB ，也可以直接与NOCO GB40的USB链接冲电？
NOCO GB40的USB链接到我的iphone充电器上的USB就可以冲电了，是吗？
我的重点是：（NOCO GB40这块电池）要在家里充电，而不是在车上冲电。主要是了解这个在家里的充电方式，谢谢你能给我一个明确的解释。
Yangtze430030 ：你好！非常谢谢你的帮助！• 小电流(100 mA 或2-6 A)持续充电非常好！也许我想两者都要，作为备份？请你：能不能详细说说这个“小电流(100 mA 或2-6 A)持续充电”怎么使用，推荐一下什么牌子的好些，谢谢！
，
当然有些USB port 能提供高一点的充电电流。
is relatively new. You may lose computer settings if you disconnect it. In autoshops, they power your system through ODB-2 port while replacing your battery. Again, parking for a month is nothing.
Best regards,
Alex