The new Hilti 5.2 AH battery.

[External image (images.tapatalk-cdn.com), not copied][External image (images.tapatalk-cdn.com), not copied]I picked up a couple of these new batteries. So far, I am impressed. Spent the day drilling and tapping steel, installing some equipment to steel 1/8″ frame and medium gauge steel, driving self tappers etc…

Not exactly a workout, but a decent day.

I used 2 freshly charged 5.2’s and by the end of the day, my impact is at 4 bars, the drill is at 3 bars. Damn.

112 watts for the 5.2ah, very impressed. Same size and weight as the 3.3ah. Compared to a Milwaukee 5.0ah (90 watts) it’s a noticeable difference in runtime. My Fuel hammer drill / driver wasn’t nearly as nice on battery life with almost 40% less torque.

According to Hilti, the batteries will increase overall power/torque as well.

If there had to be a negative, it makes the charger get warmer than charging a 3.3 ah.

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HiltiWpg wrote:

I used 2 freshly charged 5.2’s and by the end of the day, my impact is at 4 bars, the drill is at 3 bars. Damn.

112 watts for the 5.2ah, very impressed. Same size and weight as the 3.3ah. Compared to a Milwaukee 5.0ah (90 watts) it’s a noticeable difference in runtime.

 

You mean Watt hours (Wh), 112 Watts would be a very weak drill. Watts is an instantaneous measure of power.

 

Watts hours are a measure of total juice, and the formula is just voltage x Ah.

 

Wow, the tool is 21.6V. It must have an extra cell per layer (i.e. 12 cells instead of 10). Of course those are just specs. The efficiency of the drill and electronics of the system could also be contributing to superior runtime.

dwain wrote:

You mean Watt hours (Wh), 112 Watts would be a very weak drill. Watts is an instantaneous measure of power.

Watts hours are a measure of total juice, and the formula is just voltage x Ah.

Wow, the tool is 21.6V. It must have an extra cell per layer (i.e. 12 cells instead of 10). Of course those are just specs. The efficiency of the drill and electronics of the system could also be contributing to superior runtime.

I hope no one was confused, I specified amp hours. I just assume most understand battery capacity, my bad.

And yes, Hilti does have an additional cell.

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HiltiWpg wrote:

I hope no one was confused, I specified amp hours. I just assume most understand battery capacity, my bad.

And yes, Hilti does have an additional cell.

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I think most around here understand that Amp hours (Ah) are a measure of battery capacity. But in fact, they are only a measure of battery capacity for a given voltage (most often 18v). A 10Ah battery on a 6V tool would still have far less total juice than your Hilti.

 

I was actually correcting your use of the term ‘112 Watts’. The battery is not 112W, but 112 Watt hours in capacity (21.6V x 5.2 Ah = 112Wh)

I know what I said and apologized for any confusion. Did you really think I meant V*Ah=W and not Wh?

So thanks for feeling like you had to correct me a second time?

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HiltiWpg wrote:

[External image (images.tapatalk-cdn.com), not copied][External image (images.tapatalk-cdn.com), not copied]I picked up a couple of these new batteries. So far, I am impressed. Spent the day drilling and tapping steel, installing some equipment to steel 1/8″ frame and medium gauge steel, driving self tappers etc…

Not exactly a workout, but a decent day.

I used 2 freshly charged 5.2’s and by the end of the day, my impact is at 4 bars, the drill is at 3 bars. Damn.

112 watts for the 5.2ah, very impressed. Same size and weight as the 3.3ah. Compared to a Milwaukee 5.0ah (90 watts) it’s a noticeable difference in runtime. My Fuel hammer drill / driver wasn’t nearly as nice on battery life with almost 40% less torque.

According to Hilti, the batteries will increase overall power/torque as well.

If there had to be a negative, it makes the charger get warmer than charging a 3.3 ah.

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That is some pretty awesome runtime. It is crazy to me how much they can get out of these things anymore.

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HiltiWpg wrote:

According to Hilti, the batteries will increase overall power/torque as well.

How can a bigger battery give you more power/torque… More runtime I can understand ..

If the batteries can deliver more current (i.e higher voltage becouse of less internal resistance), the torque and power ratings will go up.
And I guess in Hilti’s situation, that might be the case.

Its not unlikey becouse a larger battery will normally have less internal resistance. But an exception is when they just increases the cell capacity. Then all bets are off. But either way, this might very well be true.

According to my rep, the battery design has improved, the connectors are beefier, the electronics have improved. Could just be better overall average power/torque from the new cells. I can’t say I noticed any difference myself.

Hilti doesn’t make wild marketing claims like everyone else does so I am inclined to believe them.

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Sounds interesting..

Open one up and let me know what cells are in there please 😛 hahahaha

kornomaniac wrote:

Open one up and let me know what cells are in there please 😛 hahahaha

I should!

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HiltiWpg wrote:

I should!

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While you are at it go ahead and open up that drill so I can see how it works! [emoji16] [emoji6]

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And the winner is …

Sony 3.6v 40a 2600mah High Drain Li-ion cell

SE US18650VTC5

Gotta love Hilti, everything is made to be serviced easily. Took about 20 seconds to get a peek inside.

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Can they take 40 amps of continues drain ?

30 amps continious according tot internet 🙂

kornomaniac wrote:

30 amps continious according tot internet 🙂

Specs says, 40 max. So yeah, 30ish wouldn’t be unreasonable.

Edit:

Yup, Sony China says 30a continuous.

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And a 60 peak. Nice

HiltiWpg wrote:

I know what I said and apologized for any confusion. Did you really think I meant V*Ah=W and not Wh?

So thanks for feeling like you had to correct me a second time?

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No offense intended. Just on your reply you didn’t acknowledge the actual correction (W.h.). This being a forum, with many readers, I like to help people understand correctly, as others have often done for me.

 

It’s all good!

KWC wrote:

How can a bigger battery give you more power/torque… More runtime I can understand ..

 

Milwaukee does this too with the XC batteries over the 2.0. you only get the full power from the XC batteries. Than again I’m thinking they throttled the 2.0 batteries so they last longer is all. I may be wrong just a guess.

KWC wrote:

How can a bigger battery give you more power/torque… More runtime I can understand ..

 

An 18V slim battery has 5 cells inside. These cells are usually 3.6V and have a certain current (amperage) rating, say 20A. The battery pack becomes 18V by wiring them in series, 3.6V x 5 = 18V. The pack is thus 18V @ 20A.

 

A fat battery has two of these inside it, 2 rows of 5 cells, but the rows are wired in parallel. Thus you still have 18V, but you double the capacity (Ah) and you also increase (double?) the current that you can pull from the battery set, e.g. 40A.

 

Thus, a tool (if electronically configured) can pull different current (and thus power) from different batteries. The new 9Ah Milwaukee batteries should be able to pull more current again, because they will have 3 rows of cells in parallel.

William S wrote:

Milwaukee does this too with the XC batteries over the 2.0. you only get the full power from the XC batteries. Than again I’m thinking they throttled the 2.0 batteries so they last longer is all. I may be wrong just a guess.

 

Say rather that they limit the maximum current draw to prevent the cells inside from overheating. A 4Ah battery will only have to pull half the current from each individual cell compared to a 2Ah, to deliver the same power.

And overpulling kills tour batteries so be glad Milwaukee, and all others, have build in this protection so you dont Fry your batteries by putting a compact on your recipe saw

My Bosch 5 ah on the grinder makes it spin faster then my 3 ah’s and it’s noticeable

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Thats because modern lithium cells ( like the ones used in the 5 amp batteries ) are rated for a higher continious Amp output then the older cells used in the 3 amp batteries from years ago 🙂

That’s why then ! I like the new high AH batteries

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