Best Practice for 2 battery packs

[DoofusOfThe Day]

I have Aventon Level 2 step through and received 2nd battery pack as part of purchase. I assume it would be best to alternate between the battery packs to achieve longest life for both. Physically swapping them each time one drains with other one that's fully charged seems a bit of a hassle, my plan was to swap them monthly charging the battery while in the bike. We leave the battery packs in the bikes in garage. Hope that's an okay practice.

 

[Atavar]

As far as best practice the advantage of multiple batteries is being able to charge a cold one.
Plugging in a battery you just finished using is not recommended. It is much better to let the cells cool to ambient temperature before charging.
It is also better to charge when the battery is between 40% and 80%.
For long term storage also you want the battery between 40% and 80%. Don’t store batteries either dead or fully charged.

 

[fabbrisd]

I understand you have (2) original Aventon main batteries - is that correct ?
On eBike Lithium Batteries - there are a few guideline objectives to maximize your batteries Performancew and Longevity.

1. Best practice after any ride is ONLY charge your battery AFTER the battery has internally cooled down to room temp
2. Best practice is to NORMALLY charge to 80% and ONLY charge to 100% if needed for the next ride.
3. Best practice for Battery Storage ONLY store at normal room temp - max charge 80% going into storage and preriodically monitor
and if charge dro[s below 30% recharge to 80%

 

[DoofusOfThe Day]

The charger that comes with Aventon batteries doesn't allow you to stop at 80% charge. Thanks for the info on letting the batteries cool down before charging. Hmm, maybe leaving batteries in bikes in the garage in this area (Atlanta) isn't the best idea. Don't like the ide of slogging them in and out, but might be best for longevity of the batteries.

 

[fabbrisd]

You have made a well thought intelligent purchase - you mentioned bikeS so you might have 2 . in the eBike space its unfortunate for Owners that "Manufacturers" supply "dumb" red-light/green-light chargers. What Manufacturers do well is provide "safe chargers" that have a reasonable current limit matched to the battery - so that your battery cells charge at a reasonable rate - and while charging the battery cells stay at a reasonable/non-damaging temperature.
If you implement the 80%/charge-100%/only-when-needed you will DOUBLE USABLE BATTERY LIFE - its that Simple and that dramatic - and this is for any Tier 1 Lithium Ion Battery (by the way this is NOT LiPo battery).
If you are a eBike Performance Enthusiast - many of us buy the Grin Satiator Programable Charger (check Amazon $375) as it will handle all voltage ranges and is programmable for different charging curves.
For you - if you search there is a more reasonable settable charger like $100/$125 - you want one with correct charge plug for yoiur Aventon(s): https://www.electrifybike.com/products/48v-300w-super-charger-80-90-100-1-5-amp-lithium-ion-battery

 

[NZSimon]

If you don’t want to fork out for / invest in the GRIN smart charger solution you can still achieve a target charge (like 80%) by using “state of charge” tables and a handy internet tool to calculate charge time required to reach say about 80%. You need to know the voltage of the battery once cooled and ready for charging and you need to know the charging amperage of your charger. Does the display on your bike show battery voltage or just bars???

If voltage, then you’re in business. The SoC tables are available by the generosity of the creator here:
Voltage to % SoC tables

The time to charge calculator is here:
Time to charge

By inputting the target battery capacity in Ah (equating to say 80% of the total Amp Hours of your battery), the charging amperage (from the label on your charger), and the current state of charge (voltage from your display converted to % state of charge from the tables) you’ll get the time on charge required. Fire up the charger, set your phone or other timer and you’re off to the races!!

 

[DoofusOfThe Day]

You have made a well thought intelligent purchase - you mentioned bikeS so you might have 2 . in the eBike space its unfortunate for Owners that "Manufacturers" supply "dumb" red-light/green-light chargers. What Manufacturers do well is provide "safe chargers" that have a reasonable current limit matched to the battery - so that your battery cells charge at a reasonable rate - and while charging the battery cells stay at a reasonable/non-damaging temperature.
If you implement the 80%/charge-100%/only-when-needed you will DOUBLE USABLE BATTERY LIFE - its that Simple and that dramatic - and this is for any Tier 1 Lithium Ion Battery (by the way this is NOT LiPo battery).
If you are a eBike Performance Enthusiast - many of us buy the Grin Satiator Programable Charger (check Amazon $375) as it will handle all voltage ranges and is programmable for different charging curves.
For you - if you search there is a more reasonable settable charger like $100/$125 - you want one with correct charge plug for yoiur Aventon(s): https://www.electrifybike.com/products/48v-300w-super-charger-80-90-100-1-5-amp-lithium-ion-battery

Thank you for the information! I looked at that less expensive charger, only 1 review. Hmmm.

 

[DoofusOfThe Day]

If you don’t want to fork out for / invest in the GRIN smart charger solution you can still achieve a target charge (like 80%) by using “state of charge” tables and a handy internet tool to calculate charge time required to reach say about 80%. You need to know the voltage of the battery once cooled and ready for charging and you need to know the charging amperage of your charger. Does the display on your bike show battery voltage or just bars???

If voltage, then you’re in business. The SoC tables are available by the generosity of the creator here:
Voltage to % SoC tables

The time to charge calculator is here:
Time to charge

By inputting the target battery capacity in Ah (equating to say 80% of the total Amp Hours of your battery), the charging amperage (from the label on your charger), and the current state of charge (voltage from your display converted to % state of charge from the tables) you’ll get the time on charge required. Fire up the charger, set your phone or other timer and you’re off to the races!!

I think I will wait on purchasing something like the GRIN. Using tables and estimating charge time should be doable. The Aventons we have (1 Pace 500.3 and 2 Level 2s displays show percentage of charge left. The batteries are 48v (14Ah). The Aventon charger is 3A output. So sounds like if I want to keep things optimal, use 80% as max charge and let battery deplete to 30%. In my case if I were at 30%, calculator shows about 3.9 hours to charge from 30% to 80% (3.6v to 11.4v).

 

[Hakaman99]

I know phones may be a bit different in reference to charging practices, but I've also heard the same percentage range for them as well. Just the same, when I charge my phone up I usually charge it to 100% overnight and then use it throughout the day and repeat the procedure. I have never had a problem with my phone battery, as they seem to hold their characteristics quite well for me.