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--- electrical:12v:drop-in_lifepo4 [2025/08/03 15:05]
frater_secessus [myth: lithium doesn't need absorption] eq
+++ electrical:12v:drop-in_lifepo4 [2025/08/28 15:17] (current)
frater_secessus [choosing a drop-in LFP battery] fleshed out
@@ Line 55: / Line 55: @@
 ===== choosing a drop-in LFP battery =====
-There are many factors here which only you will be able to assess.
+There are many factors here which only you will be able to assess. Basic due diligence will involve:
+  * reading and understanding the specs (see below)
+  * searching for youtube teardowns and testing on that particular model
+Shortcut:  Will Prowse has [[https://www.mobile-solarpower.com/lithium-batteries.html|a list of recommended, tested batteries]] which can be trusted.
+**Heads up**:  do not use lowest-possible-price as the main criterion for a battery unless there was a test/teardown available for it.
 ==== voltage ====
@@ Line 89: / Line 97: @@
 LFP cells can be damaged by overvoltage.  Charging is typically disabled when one or more cells rises to ~3.65v (~14.6vv for the pack)
+=== low temperature (~freezing) charge cutoff ===
+[not present in all BMS]
+LFP cells are damaged by charging when the cells are at ~freezing temperatures.((discharging too, but the limits are much colder))
+Lack of **low temperature cutoff** is not necessarily a deal-breaker.  Maybe you live in a hot location.  Maybe your chargers have low temperature cutoff.  Maybe you externally warm your battery.
+[[opinion:frater_secessus:self-heated_lifepo4|externally warmed vs. self-heated LiFePO4]]
 === high temperature charge/discharge cutoff ===
@@ Line 107: / Line 128: @@
-=== low temperature (~freezing) charge cutoff ===
-[not present in all BMS]
-LFP cells are damaged by charging when the cells are at ~freezing temperatures.((discharging too, but the limits are much colder))
-Lack of **low temperature cutoff** is not necessarily a deal-breaker.  Maybe you live in a hot location.  Maybe your chargers have low temperature cutoff.  Maybe you externally warm your battery.
-[[opinion:frater_secessus:self-heated_lifepo4|externally warmed vs. self-heated LiFePO4]]
@@ Line 451: / Line 463: @@
 Depends on the charger and how your Li wants to be charged.  Most **fully-configurable** chargers can be used to charge Li.((Some simpler controllers that only have selectable presets like AGM or gel //may// have a preset that overlaps with the correct charging specs for your battery.  Read the specs carefully.))    Note that some so-called "lithium compatible" chargers may have presets that do not match the requirements of your particular battery, so read the specs.
+This info can also be used to make a custom (USER) profile for LiFePO4 banks.
 Here is the order of operations:

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