Any real difference in these two batteries besides the price?

Question

MacBook Pro 15" Retina Display Mid 2015

2.2 GHz (Turbo Boost up to 3.4 GHz), 2.5 GHz (Turbo Boost up to 3.7 GHz), or 2.8 GHz (Turbo Boost up to 4.0 GHz) quad-core Intel Core i7 processor with 6 MB shared L3 cache and an optional AMD Radeon R9 M370X dGPU.

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ninobravo @ninobravo

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crwdns2931729:0crwdne2931729:0: Ndz 7, 2022

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Any real difference in these two batteries besides the price?

The specs for the A1494 battery for the MacBook Pro 15" Retina A1398 Late 2013 to Mid 2014 are the same as the A1618 specified only for the MBP 15" Retina Mid-2015, but the only apparent difference is the plastic tab in the bottom center, and I've read plenty of reviews where people say they just cut it off and it fit fine after applying the adhesive - anyone tried it in the Mid-2015? Is it just a gratuitous markup?

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Dan @danj

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Self employed contract worker

35

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crwdns2931729:0crwdne2931729:0: Ndz 7, 2022

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While the specs of the batteries are the same!

Watt Hours: 99 Wh
Voltage: 11.26 V
Milliamp Hours: 8800 mAh

And they do look similar!

The chemistry of the batteries are different! As such the charging curves are different! As such you won't get the best performance from your systems charger.

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Ah, yes - I totally missed the Li-Po/Li-Ion difference - thanks for catching that!

crwdns2934271:0Ndz 7, 2022crwdnd2934271:0 ninobravo crwdne2934271:0

Sorry for the late comment on this, but both of the batteries in these images have "Li-ion Polymer Battery" on the battery, so look to use the same technology. Could you explain what you mean by the chemistry being different?

crwdns2934271:0Sun 5, 2023crwdnd2934271:0 David crwdne2934271:0

@drwalton - I figured someone would ask! Li-ion Polymer Is the construction not the Chemistry!

Think of it this way… you like potato’s but which one? Russets, White or how about Reds. They are all potatoes but the chemistry are different.

Batteries are the same the makers tweak things to get more power out of the battery without altering its physical size, or the availability of the cheaper material is the issue. Sometimes there is no added cost sometimes the materials are more expensive.

crwdns2934271:0Sun 5, 2023crwdnd2934271:0 Dan crwdne2934271:0

@Dan Is it okay to use A1618 instead of A1494 in mid 2014 Macbook Pro?

crwdns2934271:0Yan 16, 2023crwdnd2934271:0 Divyank Dubey crwdne2934271:0

While you can do it, there is a slight performance hit!

Think of it this way…

You have a a liter container which can hold of course a liter! So clearly it won’t hold a US gallon! Now let’s turn this around, what happens when we have a gallon container and fill it with a liter no problem! But you aren’t filling it to a gallon!

The logic which fills the battery has a charging curve designed for the given battery it was designed to support. So while leaving the systems charger plugged in can trickle charge the battery higher the battery may not offer that added power as there are a few other variables that come to play.

Today the availability of the older battery is getting hard. Even the battery makers are not producing it any more (they now post both batts IDs within the same batt) you really don’t have a choice 😢

crwdns2934271:0Yan 16, 2023crwdnd2934271:0 Dan crwdne2934271:0

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Ah, yes - I totally missed the Li-Po/Li-Ion difference - thanks for catching that! — ninobravo
Sorry for the late comment on this, but both of the batteries in these images have "Li-ion Polymer Battery" on the battery, so look to use the same technology. Could you explain what you mean by the chemistry being different? — David
@drwalton - I figured someone would ask! Li-ion Polymer Is the construction not the Chemistry!

Think of it this way… you like potato’s but which one? Russets, White or how about Reds. They are all potatoes but the chemistry are different.

Batteries are the same the makers tweak things to get more power out of the battery without altering its physical size, or the availability of the cheaper material is the issue. Sometimes there is no added cost sometimes the materials are more expensive. — Dan
@Dan Is it okay to use A1618 instead of A1494 in mid 2014 Macbook Pro? — Divyank Dubey
While you can do it, there is a slight performance hit!

Think of it this way…

You have a a liter container which can hold of course a liter! So clearly it won’t hold a US gallon! Now let’s turn this around, what happens when we have a gallon container and fill it with a liter no problem! But you aren’t filling it to a gallon!

The logic which fills the battery has a charging curve designed for the given battery it was designed to support. So while leaving the systems charger plugged in can trickle charge the battery higher the battery may not offer that added power as there are a few other variables that come to play.

Today the availability of the older battery is getting hard. Even the battery makers are not producing it any more (they now post both batts IDs within the same batt) you really don’t have a choice 😢 — Dan

MacBook Pro 15" Retina Display Mid 2015

Any real difference in these two batteries besides the price?

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